<SEC-DOCUMENT>0001628280-25-042266.txt : 20250922
<SEC-HEADER>0001628280-25-042266.hdr.sgml : 20250922
<ACCEPTANCE-DATETIME>20250922093734
ACCESSION NUMBER:		0001628280-25-042266
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		13
CONFORMED PERIOD OF REPORT:	20250922
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20250922
DATE AS OF CHANGE:		20250922

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CIENA CORP
		CENTRAL INDEX KEY:			0000936395
		STANDARD INDUSTRIAL CLASSIFICATION:	TELEPHONE & TELEGRAPH APPARATUS [3661]
		ORGANIZATION NAME:           	04 Manufacturing
		EIN:				232725311
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1101

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36250
		FILM NUMBER:		251328690

	BUSINESS ADDRESS:	
		STREET 1:		7035 RIDGE ROAD
		CITY:			HANOVER
		STATE:			MD
		ZIP:			21076
		BUSINESS PHONE:		4108658500

	MAIL ADDRESS:	
		STREET 1:		7035 RIDGE ROAD
		CITY:			HANOVER
		STATE:			MD
		ZIP:			21076
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>cien-20250922.htm
<DESCRIPTION>8-K
<TEXT>
<XBRL>
<?xml version='1.0' encoding='ASCII'?>
<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:a3aa39a5-8ebc-4ccf-ae73-0edce48fd558,g:5f61adc8-e612-4a1c-957f-2d86606569ae,d:b357d4d33ca34ee79eec3bf2ec25b09a-->
<html xmlns:ix="http://www.xbrl.org/2013/inlineXBRL" xmlns:ixt="http://www.xbrl.org/inlineXBRL/transformation/2020-02-12" xmlns:dei="http://xbrl.sec.gov/dei/2025" xmlns="http://www.w3.org/1999/xhtml" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:ixt-sec="http://www.sec.gov/inlineXBRL/transformation/2015-08-31" xml:lang="en-US"><head><meta http-equiv="Content-Type" content="text/html"/>


<title>cien-20250922</title></head><body><div style="display:none"><ix:header><ix:hidden><ix:nonNumeric contextRef="c-1" name="dei:EntityCentralIndexKey" id="f-21">0000936395</ix:nonNumeric><ix:nonNumeric contextRef="c-1" name="dei:AmendmentFlag" id="f-22">false</ix:nonNumeric></ix:hidden><ix:references xml:lang="en-US"><link:schemaRef xlink:type="simple" xlink:href="cien-20250922.xsd"/></ix:references><ix:resources><xbrli:context id="c-1"><xbrli:entity><xbrli:identifier scheme="http://www.sec.gov/CIK">0000936395</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2025-09-22</xbrli:startDate><xbrli:endDate>2025-09-22</xbrli:endDate></xbrli:period></xbrli:context></ix:resources></ix:header></div><div id="ib357d4d33ca34ee79eec3bf2ec25b09a_1"></div><div style="min-height:18pt;width:100%"><div><span><br/></span></div></div><div style="text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.561%"><tr><td style="width:1.0%"/><td style="width:32.233%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:32.233%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:32.234%"/><td style="width:0.1%"/></tr><tr style="height:9pt"><td colspan="3" style="border-bottom:3pt double #000000;padding:0 1pt"/><td colspan="3" style="border-bottom:3pt double #000000;padding:0 1pt"/><td colspan="3" style="border-bottom:3pt double #000000;padding:0 1pt"/></tr></table></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:700;line-height:120%">UNITED STATES</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:700;line-height:120%">SECURITIES AND EXCHANGE COMMISSION</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:700;line-height:120%">Washington, DC 20549</span></div><div style="margin-top:5pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.561%"><tr><td style="width:1.0%"/><td style="width:32.233%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:32.233%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:32.234%"/><td style="width:0.1%"/></tr><tr style="height:9pt"><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/></tr></table></div><div style="margin-bottom:1pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:16pt;font-weight:700;line-height:120%">FORM <ix:nonNumeric contextRef="c-1" name="dei:DocumentType" id="f-1">8-K</ix:nonNumeric> </span></div><div style="margin-top:5pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.561%"><tr><td style="width:1.0%"/><td style="width:32.233%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:32.233%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:32.234%"/><td style="width:0.1%"/></tr><tr style="height:9pt"><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-bottom:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/></tr></table></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:700;line-height:120%">CURRENT REPORT </span></div><div style="margin-top:6pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:700;line-height:120%">Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934</span></div><div style="margin-top:6pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Date of report (Date of earliest event reported):</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">    <ix:nonNumeric contextRef="c-1" name="dei:DocumentPeriodEndDate" format="ixt:date-monthname-day-year-en" id="f-2">September 22, 2025</ix:nonNumeric> </span></div><div style="margin-top:5pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.561%"><tr><td style="width:1.0%"/><td style="width:32.233%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:32.233%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:32.234%"/><td style="width:0.1%"/></tr><tr style="height:15pt"><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-bottom:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/></tr></table></div><div style="margin-top:1pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:20pt;font-weight:700;line-height:100%"><ix:nonNumeric contextRef="c-1" name="dei:EntityRegistrantName" id="f-3">Ciena Corp</ix:nonNumeric>oration</span></div><div style="margin-bottom:6pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:110%">(Exact name of registrant as specified in its charter)</span></div><div style="margin-top:5pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.561%"><tr><td style="width:1.0%"/><td style="width:32.233%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:32.233%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:32.234%"/><td style="width:0.1%"/></tr><tr style="height:15pt"><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/></tr></table></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:2pt;font-weight:400;line-height:120%">  </span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Commission File Number:</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"> <ix:nonNumeric contextRef="c-1" name="dei:EntityFileNumber" id="f-4">001-36250</ix:nonNumeric> </span></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span><br/></span></div><div style="width:100.000%"><div style="display:inline-block;vertical-align:top;width:35.964%"><div><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"><ix:nonNumeric contextRef="c-1" name="dei:EntityIncorporationStateCountryCode" format="ixt-sec:stateprovnameen" id="f-5">Delaware</ix:nonNumeric></span></div><div style="margin-bottom:1pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(State or other jurisdiction of incorporation)</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"><ix:nonNumeric contextRef="c-1" name="dei:EntityAddressAddressLine1" id="f-6">7035 Ridge Road</ix:nonNumeric>, <ix:nonNumeric contextRef="c-1" name="dei:EntityAddressCityOrTown" id="f-7">Hanover</ix:nonNumeric>, <ix:nonNumeric contextRef="c-1" name="dei:EntityAddressStateOrProvince" id="f-8">MD</ix:nonNumeric> </span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(Address of principal executive offices)</span></div><div><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div><div><span><br/></span></div></div><div style="display:inline-block;max-width:28.070%;min-width:27.070%;vertical-align:top"></div><div style="display:inline-block;vertical-align:top;width:35.966%"><div><span><br/></span></div><div style="margin-bottom:1pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"><ix:nonNumeric contextRef="c-1" name="dei:EntityTaxIdentificationNumber" id="f-9">23-2725311</ix:nonNumeric></span></div><div style="margin-bottom:1pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(IRS Employer Identification No.)</span></div><div style="margin-bottom:1pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"><ix:nonNumeric contextRef="c-1" name="dei:EntityAddressPostalZipCode" id="f-10">21076</ix:nonNumeric> </span></div><div style="margin-bottom:1pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(Zip Code)</span></div></div></div><div style="margin-bottom:1pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Registrant's telephone number, including area code</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">:</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:120%"> </span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">(<ix:nonNumeric contextRef="c-1" name="dei:CityAreaCode" id="f-11">410</ix:nonNumeric>)</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:120%">&#160;</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"><ix:nonNumeric contextRef="c-1" name="dei:LocalPhoneNumber" id="f-12">694-5700</ix:nonNumeric></span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:120%"> </span></div><div style="margin-bottom:6pt;text-align:center"><span><br/></span></div><div style="margin-bottom:1pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Not Applicable</span></div><div style="margin-bottom:6pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(Former name or former address, if changed since last report)</span></div><div style="margin-top:5pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.707%"><tr><td style="width:1.0%"/><td style="width:3.445%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:30.718%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:30.718%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:30.719%"/><td style="width:0.1%"/></tr><tr><td colspan="12" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:1pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:100%">see </span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">General Instruction A.2. below):</span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Arial Unicode MS',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="c-1" name="dei:WrittenCommunications" format="ixt-sec:boolballotbox" id="f-13">&#9744;</ix:nonNumeric></span></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:1pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Arial Unicode MS',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="c-1" name="dei:SolicitingMaterial" format="ixt-sec:boolballotbox" id="f-14">&#9744;</ix:nonNumeric></span></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:1pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Arial Unicode MS',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="c-1" name="dei:PreCommencementTenderOffer" format="ixt-sec:boolballotbox" id="f-15">&#9744;</ix:nonNumeric></span></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:1pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Arial Unicode MS',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="c-1" name="dei:PreCommencementIssuerTenderOffer" format="ixt-sec:boolballotbox" id="f-16">&#9744;</ix:nonNumeric></span></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</span></td></tr></table></div><div style="text-align:center"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:32.233%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:32.233%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:32.234%"/><td style="width:0.1%"/></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Securities registered pursuant to Section 12(b) of the Act:</span></td></tr><tr><td colspan="3" style="border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:1pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Title of each class</span></div></td><td colspan="3" style="border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:1pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Trading Symbol(s)</span></div></td><td colspan="3" style="border-left:1pt solid #000000;border-right:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:1pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Name of each exchange on which registered</span></div></td></tr><tr><td colspan="3" style="border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:1pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="c-1" name="dei:Security12bTitle" id="f-17">Common stock, $0.01 par value</ix:nonNumeric></span></div></td><td colspan="3" style="border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:1pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="c-1" name="dei:TradingSymbol" id="f-18">CIEN</ix:nonNumeric></span></div></td><td colspan="3" style="border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:1pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="c-1" name="dei:SecurityExchangeName" format="ixt-sec:exchnameen" id="f-19">New York Stock Exchange</ix:nonNumeric></span></div></td></tr></table></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (&#167;230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (&#167;240.12b-2 of this chapter).</span></div><div style="text-align:right"><span><br/></span></div><div style="text-align:right"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Emerging growth company </span><span style="color:#000000;font-family:'Arial Unicode MS',sans-serif;font-size:10pt;font-weight:400;line-height:120%"><ix:nonNumeric contextRef="c-1" name="dei:EntityEmergingGrowthCompany" format="ixt-sec:boolballotbox" id="f-20">&#9744;</ix:nonNumeric></span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. </span><span style="color:#000000;font-family:'Arial Unicode MS',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#9744;</span></div><div style="height:18pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><span><br/></span></div></div></div><div id="ib357d4d33ca34ee79eec3bf2ec25b09a_7"></div><hr style="page-break-after:always"/><div style="min-height:42.75pt;width:100%"><div><span><br/></span></div></div><div style="margin-bottom:10pt;text-align:justify"><span><br/></span></div><div style="-sec-extract:summary;margin-bottom:10pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:174%">Item 8.01 &#8211; OTHER EVENTS</span></div><div><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">On September 22, 2025, Ciena Corporation ("Ciena") issued a press release announcing that it has entered into a definitive agreement to acquire privately-held Nubis Communications, Inc., which specializes in high-performance, ultra-compact, low-power optical and electrical interconnects tailored to support artificial intelligence (AI) workloads. The transaction is expected to close during Ciena&#8217;s fiscal fourth quarter 2025 and is subject to customary closing conditions. A copy of the press release is attached hereto as Exhibit 99.1 and incorporated by reference herein.</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-style:italic;font-weight:400;line-height:120%">This Current Report on Form 8-K contains forward-looking statements that are based on management&#8217;s current expectations, forecasts, information and assumptions. These statements involve inherent risks and uncertainties. Actual results or outcomes may differ materially from those stated or implied in the forward-looking statements because of risks and uncertainties, including the risks that the acquisition may not close when expected, or at all, that problems may arise in successfully integrating the acquired business, that the acquisition may fail to achieve its expected benefits, and those risks and uncertainties detailed in Ciena&#8217;s most recent annual and quarterly reports filed with the Securities and Exchange Commission. Forward-looking statements include statements regarding Ciena's expectations, beliefs, intentions or strategies, and can be identified by words such as "anticipate," "believe," "could," "estimate," "expect," "intend," "may," and "will," and similar words and expressions. Ciena assumes no obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise, except to the extent required by law.</span></div><div><span><br/></span></div><div><span><br/></span></div><div style="margin-bottom:10pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:107%">Item 9.01 Financial Statements and Exhibits.</span></div><div style="margin-bottom:10pt;margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:89.181%"><tr><td style="width:1.0%"/><td style="width:15.949%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:25.621%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:25.621%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:28.409%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:1pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:100%;text-decoration:underline">Exhibit Number</span></div></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:1pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:100%;text-decoration:underline">Description of Document</span></div></td></tr><tr style="height:14pt"><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:0 1pt"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:1pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:100%">99.1</span></div></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:top"><div><span style="color:#0000ff;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="-sec-extract:exhibit;color:#0000ff;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:100%;text-decoration:underline" href="a250922pressrelease.htm">Text of Press Release dated September 22, 2025.</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:1pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:100%">104</span></div></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:100%">Cover Page Interactive Data File (embedded within the Inline XBRL document).</span></td></tr></table></div><div style="margin-bottom:10pt;text-align:justify"><span><br/></span></div><div style="height:42.75pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><span><br/></span></div></div></div><div id="ib357d4d33ca34ee79eec3bf2ec25b09a_10"></div><hr style="page-break-after:always"/><div style="min-height:42.75pt;width:100%"><div><span><br/></span></div></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:120%">SIGNATURES</span></div><div style="margin-bottom:12pt"><span><br/></span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.853%"><tr><td style="width:1.0%"/><td style="width:98.900%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:1pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:100%">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.</span></div></td></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">&#160;&#160;&#160;&#160;</span></div><div><span><br/></span></div><div><span><br/></span></div><div><span><br/></span></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:30.917%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:4.163%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:61.620%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="6" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:1pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:100%">Ciena Corporation</span></div></td></tr><tr style="height:15pt"><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/></tr><tr style="height:15pt"><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:1pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:100%">Date: September 22, 2025</span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:1pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:100%">By:</span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:100%">/s/ Sheela Kosaraju</span></td></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:1pt;padding-left:238.5pt;text-align:justify;text-indent:-236.25pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:100%">Sheela Kosaraju</span></div></td></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:1pt;padding-left:238.5pt;text-indent:-236.25pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:100%">Senior Vice President, General Counsel and Assistant Secretary</span></div></td></tr></table></div><div><span><br/></span></div><div style="height:42.75pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><span><br/></span></div></div></div></body></html>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>a250922pressrelease.htm
<DESCRIPTION>EX-99.1
<TEXT>
<html><head>
<!-- Document created using Wdesk -->
<!-- Copyright 2025 Workiva -->
<title>Document</title></head><body><div id="iffc22852755544c98c9cbd8daf1a829e_37"></div><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:400;line-height:112%">FOR IMMEDIATE RELEASE</font></div><div><font><br></font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:14pt;font-weight:700;line-height:112%">Ciena to Acquire Nubis Communications to Expand its Inside the </font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:14pt;font-weight:700;line-height:112%">Data Center Strategy and Further Address Growing AI Workloads</font></div><div><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:150%">Hanover, Md. &#8211; September 22, 2025 &#8211; </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">Ciena (NYSE&#58; CIEN), the global leader in high-speed connectivity, today announced that it has entered into a definitive agreement to acquire Nubis Communications, a privately-held company headquartered in New Providence, New Jersey. The addition of Nubis, which specializes in</font><font style="color:#1b1b1b;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%"> high-performance, ultra-compact, low-power optical and electrical interconnects tailored to support AI workloads, will expand Ciena&#8217;s portfolio and add critical talent to address a wider range of opportunities inside the data center</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:150%">.</font></div><div><font><br></font></div><div><font style="color:#1b1b1b;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">Nubis&#8217; solutions </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">complement Ciena&#8217;s existing high-speed interconnects portfolio</font><font style="color:#1b1b1b;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%"> and will enable new capabilities to support </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">growing AI workloads by significantly increasing scale up and scale out capacity and density inside the data center. The Nubis portfolio includes two key technologies&#58;</font></div><div><font><br></font></div><div style="padding-left:36pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:150%">&#8226;</font><font style="color:#1b1b1b;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:150%;padding-left:14.5pt">Co-Packaged Optics (CPO) &#47; Near Packaged Optics (NPO)&#58;</font><font style="color:#1b1b1b;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%"> </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">Nubis&#8217; compact, high-density optical modules deliver ultra-fast data transfer using light instead of traditional electrical signals. Supporting up to 6.4</font><font style="color:#ff0000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%"> </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">Tb&#47;s full-duplex bandwidth, these modules are optimized for low-latency, low-power operation &#8211; making them ideal for scaling AI systems. Combined with Ciena&#8217;s high-speed SerDes, Nubis&#8217; optical engines enable differentiated CPO solutions to address high-performance connectivity needs inside and between racks.</font></div><div><font><br></font></div><div style="padding-left:36pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:150%">&#8226;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:150%;padding-left:14.5pt">Electrical ACC</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">&#58; </font><font style="color:#1b1b1b;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">Nubis&#8217;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%"> advanced analog electronics</font><font style="color:#1b1b1b;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%"> enable Active Copper Cables (ACC) to support high-speed data transmission, allowing data to travel up to 4 meters at speeds of 200 Gb&#47;s per lane. </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">This low-power, low-latency solution </font><font style="color:#1b1b1b;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">helps customers connect more AI accelerators across racks without the limitations of traditional copper or DSP-based solutions.</font></div><div><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">In addition, the acquisition will strengthen Ciena&#8217;s expertise inside the data center, with the addition of 50+ talented engineers with deep technical expertise and strong cultural alignment with Ciena&#8217;s R&#38;D team.</font></div><div><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">&#8220;The acquisition of Nubis represents a significant step forward in Ciena&#8217;s strategy to address the rapidly growing demand for scalable, high-performance connectivity inside the data center, driven by the explosive growth of AI-related traffic,&#8221; said David Rothenstein, Chief Strategy Officer at Ciena. &#8220;With ownership of these key technologies for a wider range of use cases inside the data center, we are expanding our competitive advantage by advancing development of differentiated solutions, reducing development costs, and driving long-term efficiency and profitability.&#8221;</font></div><div><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">&#8220;The Nubis team is thrilled to join Ciena and enhance its industry-leading portfolio with our breakthrough interconnect technologies,&#8221; said Dan Harding, CEO of Nubis. &#8220;Together, we will advance Ciena's data </font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">center strategy by delivering reliable, high-quality, and high-performance interconnect solutions to support the next generation of AI workloads.&#8221;</font></div><div><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">Under the terms of the agreement, Ciena will acquire Nubis in an all-cash transaction for $270 million, subject to a customary purchase price adjustment mechanism for the amount of cash, debt, and net working capital of Nubis at closing, among other items. In addition, Ciena will enter into certain employee retention arrangements in connection with the transaction. The transaction has been approved by the boards of directors of both companies as well as Nubis&#8217; shareholders. The transaction is expected to close during Ciena&#8217;s fiscal fourth quarter 2025 and is subject to customary closing conditions.</font></div><div><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:700;line-height:150%">Supplemental Materials</font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">In conjunction with this announcement, Ciena has posted to the Events and Presentations page of the Investor Relations section of its website a recorded transaction overview presentation and accompanying transcript.</font></div><div><font><br></font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:150%">###</font></div><div><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:112%">About Ciena</font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:112%">Ciena is the global leader in high-speed connectivity.</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:700;line-height:112%"> </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:112%">We build the world&#8217;s most adaptive networks to support exponential growth in bandwidth demand. By harnessing the power of our networking systems, components, automation software, and services, Ciena revolutionizes data transmission and network management. With unparalleled expertise and innovation, we empower our customers, partners, and communities to thrive in the AI era. For updates on Ciena, follow us on&#8239;LinkedIn and&#8239;X, or visit the&#8239;Ciena Insights webpage and Ciena website.</font></div><div><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:112%">Note to Ciena Investors</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-style:italic;font-weight:400;line-height:112%"> </font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:112%">You are encouraged to review the Investors section of our website, where we routinely post press releases, SEC filings, recent news, financial results, and other announcements. From time to time we exclusively post material information to this website along with other disclosure channels that we use. This press release contains certain forward-looking statements that are based on our current expectations, forecasts, information, and assumptions. These statements involve inherent risks and uncertainties.</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:400;line-height:112%">  </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:112%">Actual results or outcomes may differ materially from those stated or implied, because of risks and uncertainties, including those detailed in our most recent annual and quarterly reports filed with the SEC. Forward-looking statements include statements regarding our</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:400;line-height:112%">  </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:112%">expectations, beliefs, intentions or strategies and can be identified by words such as &#34;anticipate,&#34; &#34;believe,&#34; &#34;could,&#34; &#34;estimate,&#34; &#34;expect,&#34; &#34;intend,&#34; &#34;may,&#34; &#34;should,&#34; &#34;will,&#34; and &#34;would&#34; or similar words. Ciena assumes no obligation to update the information included in this press release, whether as a result of new information, future events or otherwis</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:400;line-height:112%">e.</font></div><div><font><br></font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font><br></font></div></div></div></body></html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>3
<FILENAME>cien-20250922.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
<TEXT>
<XBRL>
<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:a3aa39a5-8ebc-4ccf-ae73-0edce48fd558,g:5f61adc8-e612-4a1c-957f-2d86606569ae-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:cien="http://www.ciena.com/20250922" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.ciena.com/20250922">
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="cien-20250922_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="cien-20250922_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="CoverPage" roleURI="http://www.ciena.com/role/CoverPage">
        <link:definition>0000001 - Document - Cover Page</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
</xs:schema>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.LAB
<SEQUENCE>4
<FILENAME>cien-20250922_lab.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
<TEXT>
<XBRL>
<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:a3aa39a5-8ebc-4ccf-ae73-0edce48fd558,g:5f61adc8-e612-4a1c-957f-2d86606569ae-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel"/>
  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:label id="lab_dei_SolicitingMaterial_27f7c6e4-c6ea-493d-914b-fcfb051bbc96_terseLabel_en-US" xlink:label="lab_dei_SolicitingMaterial" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Soliciting Material</link:label>
    <link:label id="lab_dei_SolicitingMaterial_label_en-US" xlink:label="lab_dei_SolicitingMaterial" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Soliciting Material</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SolicitingMaterial"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_SolicitingMaterial" xlink:to="lab_dei_SolicitingMaterial" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_WrittenCommunications_ef5a62ca-8e64-4abd-9a9e-82ef6b1d4e3b_terseLabel_en-US" xlink:label="lab_dei_WrittenCommunications" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Written Communications</link:label>
    <link:label id="lab_dei_WrittenCommunications_label_en-US" xlink:label="lab_dei_WrittenCommunications" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Written Communications</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_WrittenCommunications"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_WrittenCommunications" xlink:to="lab_dei_WrittenCommunications" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_LocalPhoneNumber_43826498-df64-48c2-bd65-45d9df4e77ac_terseLabel_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Local Phone Number</link:label>
    <link:label id="lab_dei_LocalPhoneNumber_label_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Local Phone Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LocalPhoneNumber" xlink:to="lab_dei_LocalPhoneNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CoverAbstract_bed59b65-24fb-4c4d-a412-69d99823c4f1_terseLabel_en-US" xlink:label="lab_dei_CoverAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cover [Abstract]</link:label>
    <link:label id="lab_dei_CoverAbstract_label_en-US" xlink:label="lab_dei_CoverAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cover [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CoverAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CoverAbstract" xlink:to="lab_dei_CoverAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentPeriodEndDate_04f9000b-1871-40d3-a7ad-aad36d45a9ae_terseLabel_en-US" xlink:label="lab_dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Period End Date</link:label>
    <link:label id="lab_dei_DocumentPeriodEndDate_label_en-US" xlink:label="lab_dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Period End Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentPeriodEndDate" xlink:to="lab_dei_DocumentPeriodEndDate" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_PreCommencementTenderOffer_7c11d9db-d928-4f37-ad6f-c2f7fc0fc8b2_terseLabel_en-US" xlink:label="lab_dei_PreCommencementTenderOffer" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pre-commencement Tender Offer</link:label>
    <link:label id="lab_dei_PreCommencementTenderOffer_label_en-US" xlink:label="lab_dei_PreCommencementTenderOffer" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pre-commencement Tender Offer</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementTenderOffer"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_PreCommencementTenderOffer" xlink:to="lab_dei_PreCommencementTenderOffer" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_AmendmentFlag_85d2ad77-0b0c-4f38-9918-65ef29ef5539_terseLabel_en-US" xlink:label="lab_dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amendment Flag</link:label>
    <link:label id="lab_dei_AmendmentFlag_label_en-US" xlink:label="lab_dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amendment Flag</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_AmendmentFlag" xlink:to="lab_dei_AmendmentFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCentralIndexKey_d6683c83-711c-44ff-842e-3e5c2ca26914_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:label id="lab_dei_EntityCentralIndexKey_label_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey" xlink:to="lab_dei_EntityCentralIndexKey" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_PreCommencementIssuerTenderOffer_eaa5337b-1cd1-4c6c-b5a5-f0590233ab2f_terseLabel_en-US" xlink:label="lab_dei_PreCommencementIssuerTenderOffer" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pre-commencement Issuer Tender Offer</link:label>
    <link:label id="lab_dei_PreCommencementIssuerTenderOffer_label_en-US" xlink:label="lab_dei_PreCommencementIssuerTenderOffer" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pre-commencement Issuer Tender Offer</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_PreCommencementIssuerTenderOffer" xlink:to="lab_dei_PreCommencementIssuerTenderOffer" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityTaxIdentificationNumber_bd26ce5a-6434-40c5-af33-1799a3418c13_terseLabel_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Tax Identification Number</link:label>
    <link:label id="lab_dei_EntityTaxIdentificationNumber_label_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Tax Identification Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityTaxIdentificationNumber" xlink:to="lab_dei_EntityTaxIdentificationNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityEmergingGrowthCompany_ab99a20f-f813-486c-b219-d17f346e8dac_terseLabel_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:label id="lab_dei_EntityEmergingGrowthCompany_label_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityEmergingGrowthCompany" xlink:to="lab_dei_EntityEmergingGrowthCompany" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityFileNumber_b6c63fb7-2b85-4e48-b401-94a08e77d8fe_terseLabel_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity File Number</link:label>
    <link:label id="lab_dei_EntityFileNumber_label_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity File Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFileNumber" xlink:to="lab_dei_EntityFileNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityRegistrantName_ac481f43-ab8c-466f-abe4-273586211d17_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:label id="lab_dei_EntityRegistrantName_label_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityRegistrantName" xlink:to="lab_dei_EntityRegistrantName" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_SecurityExchangeName_6079cb1a-37b3-45aa-891d-fe3d96b6a7b9_terseLabel_en-US" xlink:label="lab_dei_SecurityExchangeName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Security Exchange Name</link:label>
    <link:label id="lab_dei_SecurityExchangeName_label_en-US" xlink:label="lab_dei_SecurityExchangeName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Security Exchange Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_SecurityExchangeName" xlink:to="lab_dei_SecurityExchangeName" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_TradingSymbol_eecdf2c1-ac8d-41c0-aa5a-b3768f63e333_terseLabel_en-US" xlink:label="lab_dei_TradingSymbol" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trading Symbol</link:label>
    <link:label id="lab_dei_TradingSymbol_label_en-US" xlink:label="lab_dei_TradingSymbol" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Symbol</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_TradingSymbol" xlink:to="lab_dei_TradingSymbol" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_5b61d5c2-4c1b-48a2-a85d-7885da0fc0cb_terseLabel_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_label_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityIncorporationStateCountryCode" xlink:to="lab_dei_EntityIncorporationStateCountryCode" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_Security12bTitle_cf24b220-e157-460e-87cd-fa9fff4e2675_terseLabel_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:label id="lab_dei_Security12bTitle_label_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_Security12bTitle" xlink:to="lab_dei_Security12bTitle" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressStateOrProvince_6738b15a-6310-4f8a-8187-ef03cce36201_terseLabel_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:label id="lab_dei_EntityAddressStateOrProvince_label_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressStateOrProvince" xlink:to="lab_dei_EntityAddressStateOrProvince" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressPostalZipCode_c9164494-cf41-4230-b851-6e38b284e519_terseLabel_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:label id="lab_dei_EntityAddressPostalZipCode_label_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressPostalZipCode" xlink:to="lab_dei_EntityAddressPostalZipCode" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressCityOrTown_11208130-8f86-48c5-84e0-eae2d1b70df8_terseLabel_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:label id="lab_dei_EntityAddressCityOrTown_label_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressCityOrTown" xlink:to="lab_dei_EntityAddressCityOrTown" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressAddressLine1_8342a319-ac02-4c58-90d8-5d2e33cf821f_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:label id="lab_dei_EntityAddressAddressLine1_label_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine1" xlink:to="lab_dei_EntityAddressAddressLine1" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentType_6b656ee2-8e6f-4b0a-a302-58925c4521f7_terseLabel_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:label id="lab_dei_DocumentType_label_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentType" xlink:to="lab_dei_DocumentType" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CityAreaCode_a1368fa8-da40-446c-aeb6-9a758116a82e_terseLabel_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">City Area Code</link:label>
    <link:label id="lab_dei_CityAreaCode_label_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">City Area Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CityAreaCode" xlink:to="lab_dei_CityAreaCode" xlink:type="arc" order="1"/>
  </link:labelLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>5
<FILENAME>cien-20250922_pre.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
<TEXT>
<XBRL>
<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:a3aa39a5-8ebc-4ccf-ae73-0edce48fd558,g:5f61adc8-e612-4a1c-957f-2d86606569ae-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.ciena.com/role/CoverPage" xlink:type="simple" xlink:href="cien-20250922.xsd#CoverPage"/>
  <link:presentationLink xlink:role="http://www.ciena.com/role/CoverPage" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CoverAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_804e540c-1467-4952-962f-9d87462629dc" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_DocumentType_804e540c-1467-4952-962f-9d87462629dc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_3b2e5138-966e-476b-b644-abcccf0bdabb" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_DocumentPeriodEndDate_3b2e5138-966e-476b-b644-abcccf0bdabb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_a2a71403-0b16-4743-a6e0-d96329c8a90b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_EntityRegistrantName_a2a71403-0b16-4743-a6e0-d96329c8a90b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_d3384985-274d-42c4-86e6-d772169bc2fe" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_EntityFileNumber_d3384985-274d-42c4-86e6-d772169bc2fe" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_dbba467b-1ac8-4bc4-bcbe-8a289de74ec5" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_EntityIncorporationStateCountryCode_dbba467b-1ac8-4bc4-bcbe-8a289de74ec5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_e899fc06-617d-4dd2-8b4c-c053263c8bcb" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_EntityTaxIdentificationNumber_e899fc06-617d-4dd2-8b4c-c053263c8bcb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_c52cb5e2-d343-4de8-abf0-4e451e83cf39" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_EntityAddressAddressLine1_c52cb5e2-d343-4de8-abf0-4e451e83cf39" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_811cf9c5-3811-437b-a050-05046796aa3a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_EntityAddressCityOrTown_811cf9c5-3811-437b-a050-05046796aa3a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_9c311a8d-c6b7-436b-9bb4-bfaae6117906" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_EntityAddressStateOrProvince_9c311a8d-c6b7-436b-9bb4-bfaae6117906" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_25491362-9ec7-4fab-bb56-4464d46af858" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_EntityAddressPostalZipCode_25491362-9ec7-4fab-bb56-4464d46af858" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_f2b9c980-075f-44f5-aace-0b520dd4300a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_CityAreaCode_f2b9c980-075f-44f5-aace-0b520dd4300a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_63feb38b-a149-42c8-b9f6-14c6ce2b180b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_LocalPhoneNumber_63feb38b-a149-42c8-b9f6-14c6ce2b180b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_2d88e599-5b64-43c6-90cc-a022fe78a0ec" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_WrittenCommunications"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_WrittenCommunications_2d88e599-5b64-43c6-90cc-a022fe78a0ec" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_70b0eaf5-8290-4fb5-9d98-bd943e13a49e" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SolicitingMaterial"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_SolicitingMaterial_70b0eaf5-8290-4fb5-9d98-bd943e13a49e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_d8390de2-b329-4354-bce7-d8a2db97ec1a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementTenderOffer"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_PreCommencementTenderOffer_d8390de2-b329-4354-bce7-d8a2db97ec1a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_1dee1bd2-32a2-4628-92a6-30b77d59c4a4" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_1dee1bd2-32a2-4628-92a6-30b77d59c4a4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_7f1000f3-c64a-4513-b5c8-b71635a3ea80" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_Security12bTitle_7f1000f3-c64a-4513-b5c8-b71635a3ea80" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_aa6ead1f-063d-42b1-8cfd-ef6174335a9d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_TradingSymbol_aa6ead1f-063d-42b1-8cfd-ef6174335a9d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_02197651-550d-4cb8-8d52-c09329332f54" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_SecurityExchangeName_02197651-550d-4cb8-8d52-c09329332f54" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_f9f78d7b-86c4-470e-84cc-c746e52a876f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_EntityEmergingGrowthCompany_f9f78d7b-86c4-470e-84cc-c746e52a876f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_6186fc7d-3b22-4d24-b35b-c2606d7a4b47" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_EntityCentralIndexKey_6186fc7d-3b22-4d24-b35b-c2606d7a4b47" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_44942749-d2ac-452c-98a1-5d9c857799a8" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_99335147-d36a-41c1-93a6-585db22a7cbf" xlink:to="loc_dei_AmendmentFlag_44942749-d2ac-452c-98a1-5d9c857799a8" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>7
<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
							function toggleNextSibling (e) {
							if (e.nextSibling.style.display=='none') {
							e.nextSibling.style.display='block';
							} else { e.nextSibling.style.display='none'; }
							}</script>
</head>
<body>
<span style="display: none;">v3.25.2</span><table class="report" border="0" cellspacing="2" id="id2">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Cover Page<br></strong></div></th>
<th class="th"><div>Sep. 22, 2025</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CoverAbstract', window );"><strong>Cover [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentType', window );">Document Type</a></td>
<td class="text">8-K<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentPeriodEndDate', window );">Document Period End Date</a></td>
<td class="text">Sep. 22,  2025<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Entity Registrant Name</a></td>
<td class="text">Ciena Corp<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityFileNumber', window );">Entity File Number</a></td>
<td class="text">001-36250<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityIncorporationStateCountryCode', window );">Entity Incorporation, State or Country Code</a></td>
<td class="text">DE<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityTaxIdentificationNumber', window );">Entity Tax Identification Number</a></td>
<td class="text">23-2725311<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressAddressLine1', window );">Entity Address, Address Line One</a></td>
<td class="text">7035 Ridge Road<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">Hanover<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressStateOrProvince', window );">Entity Address, State or Province</a></td>
<td class="text">MD<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">21076<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CityAreaCode', window );">City Area Code</a></td>
<td class="text">410<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_LocalPhoneNumber', window );">Local Phone Number</a></td>
<td class="text">694-5700<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_WrittenCommunications', window );">Written Communications</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SolicitingMaterial', window );">Soliciting Material</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementTenderOffer', window );">Pre-commencement Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementIssuerTenderOffer', window );">Pre-commencement Issuer Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Common stock, $0.01 par value<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">CIEN<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NYSE<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityEmergingGrowthCompany', window );">Entity Emerging Growth Company</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityCentralIndexKey', window );">Entity Central Index Key</a></td>
<td class="text">0000936395<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_AmendmentFlag', window );">Amendment Flag</a></td>
<td class="text">false<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_AmendmentFlag">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_AmendmentFlag</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CityAreaCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Area code of city</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CityAreaCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CoverAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Cover page.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CoverAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentPeriodEndDate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentPeriodEndDate</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:dateItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentType">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentType</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:submissionTypeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Address Line 1 such as Attn, Building Name, Street Name</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressCityOrTown">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the City or Town</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressCityOrTown</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressPostalZipCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Code for the postal or zip code</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressPostalZipCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressStateOrProvince">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the state or province.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressStateOrProvince</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:stateOrProvinceItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCentralIndexKey</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:centralIndexKeyItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityEmergingGrowthCompany">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Indicate if registrant meets the emerging growth company criteria.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityEmergingGrowthCompany</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityFileNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityFileNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:fileNumberItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityIncorporationStateCountryCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Two-character EDGAR code representing the state or country of incorporation.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityIncorporationStateCountryCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarStateCountryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityRegistrantName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityRegistrantName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityTaxIdentificationNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityTaxIdentificationNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:employerIdItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_LocalPhoneNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Local phone number for entity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_LocalPhoneNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementIssuerTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 13e<br> -Subsection 4c<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementIssuerTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14d<br> -Subsection 2b<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_Security12bTitle">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Title of a 12(b) registered security.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_Security12bTitle</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:securityTitleItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SecurityExchangeName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the Exchange on which a security is registered.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection d1-1<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SecurityExchangeName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarExchangeCodeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SolicitingMaterial">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14a<br> -Subsection 12<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SolicitingMaterial</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_TradingSymbol">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Trading symbol of an instrument as listed on an exchange.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_TradingSymbol</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:tradingSymbolItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_WrittenCommunications">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br> -Section 425<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_WrittenCommunications</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
</div>
</body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>8
<FILENAME>Show.js
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
// Edgar(tm) Renderer was created by staff of the U.S. Securities and Exchange Commission.  Data and content created by government employees within the scope of their employment are not subject to domestic copyright protection. 17 U.S.C. 105.
var Show={};Show.LastAR=null,Show.showAR=function(a,r,w){if(Show.LastAR)Show.hideAR();var e=a;while(e&&e.nodeName!='TABLE')e=e.nextSibling;if(!e||e.nodeName!='TABLE'){var ref=((window)?w.document:document).getElementById(r);if(ref){e=ref.cloneNode(!0);
e.removeAttribute('id');a.parentNode.appendChild(e)}}
if(e)e.style.display='block';Show.LastAR=e};Show.hideAR=function(){Show.LastAR.style.display='none'};Show.toggleNext=function(a){var e=a;while(e.nodeName!='DIV')e=e.nextSibling;if(!e.style){}else if(!e.style.display){}else{var d,p_;if(e.style.display=='none'){d='block';p='-'}else{d='none';p='+'}
e.style.display=d;if(a.textContent){a.textContent=p+a.textContent.substring(1)}else{a.innerText=p+a.innerText.substring(1)}}}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>9
<FILENAME>report.css
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
/* Updated 2009-11-04 */
/* v2.2.0.24 */

/* DefRef Styles */
.report table.authRefData{
	background-color: #def;
	border: 2px solid #2F4497;
	font-size: 1em;
	position: absolute;
}

.report table.authRefData a {
	display: block;
	font-weight: bold;
}

.report table.authRefData p {
	margin-top: 0px;
}

.report table.authRefData .hide {
	background-color: #2F4497;
	padding: 1px 3px 0px 0px;
	text-align: right;
}

.report table.authRefData .hide a:hover {
	background-color: #2F4497;
}

.report table.authRefData .body {
	height: 150px;
	overflow: auto;
	width: 400px;
}

.report table.authRefData table{
	font-size: 1em;
}

/* Report Styles */
.pl a, .pl a:visited {
	color: black;
	text-decoration: none;
}

/* table */
.report {
	background-color: white;
	border: 2px solid #acf;
	clear: both;
	color: black;
	font: normal 8pt Helvetica, Arial, san-serif;
	margin-bottom: 2em;
}

.report hr {
	border: 1px solid #acf;
}

/* Top labels */
.report th {
	background-color: #acf;
	color: black;
	font-weight: bold;
	text-align: center;
}

.report th.void	{
	background-color: transparent;
	color: #000000;
	font: bold 10pt Helvetica, Arial, san-serif;
	text-align: left;
}

.report .pl {
	text-align: left;
	vertical-align: top;
	white-space: normal;
	width: 200px;
	white-space: normal; /* word-wrap: break-word; */
}

.report td.pl a.a {
	cursor: pointer;
	display: block;
	width: 200px;
	overflow: hidden;
}

.report td.pl div.a {
	width: 200px;
}

.report td.pl a:hover {
	background-color: #ffc;
}

/* Header rows... */
.report tr.rh {
	background-color: #acf;
	color: black;
	font-weight: bold;
}

/* Calendars... */
.report .rc {
	background-color: #f0f0f0;
}

/* Even rows... */
.report .re, .report .reu {
	background-color: #def;
}

.report .reu td {
	border-bottom: 1px solid black;
}

/* Odd rows... */
.report .ro, .report .rou {
	background-color: white;
}

.report .rou td {
	border-bottom: 1px solid black;
}

.report .rou table td, .report .reu table td {
	border-bottom: 0px solid black;
}

/* styles for footnote marker */
.report .fn {
	white-space: nowrap;
}

/* styles for numeric types */
.report .num, .report .nump {
	text-align: right;
	white-space: nowrap;
}

.report .nump {
	padding-left: 2em;
}

.report .nump {
	padding: 0px 0.4em 0px 2em;
}

/* styles for text types */
.report .text {
	text-align: left;
	white-space: normal;
}

.report .text .big {
	margin-bottom: 1em;
	width: 17em;
}

.report .text .more {
	display: none;
}

.report .text .note {
	font-style: italic;
	font-weight: bold;
}

.report .text .small {
	width: 10em;
}

.report sup {
	font-style: italic;
}

.report .outerFootnotes {
	font-size: 1em;
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>11
<FILENAME>FilingSummary.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>1</ContextCount>
  <ElementCount>22</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>0</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>0</UnitCount>
  <MyReports>
    <Report instance="cien-20250922.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Cover Page</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ciena.com/role/CoverPage</Role>
      <ShortName>Cover Page</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="8-K" isOnlyDei="true" original="cien-20250922.htm">cien-20250922.htm</File>
    <File>cien-20250922.xsd</File>
    <File>cien-20250922_lab.xml</File>
    <File>cien-20250922_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="22">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>JSON
<SEQUENCE>13
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
{
 "version": "2.2",
 "instance": {
  "cien-20250922.htm": {
   "nsprefix": "cien",
   "nsuri": "http://www.ciena.com/20250922",
   "dts": {
    "inline": {
     "local": [
      "cien-20250922.htm"
     ]
    },
    "schema": {
     "local": [
      "cien-20250922.xsd"
     ],
     "remote": [
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xl-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xlink-2003-12-31.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd",
      "https://www.xbrl.org/dtr/type/2024-01-31/types.xsd",
      "https://xbrl.sec.gov/dei/2025/dei-2025.xsd"
     ]
    },
    "labelLink": {
     "local": [
      "cien-20250922_lab.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "cien-20250922_pre.xml"
     ]
    }
   },
   "keyStandard": 22,
   "keyCustom": 0,
   "axisStandard": 0,
   "axisCustom": 0,
   "memberStandard": 0,
   "memberCustom": 0,
   "hidden": {
    "total": 2,
    "http://xbrl.sec.gov/dei/2025": 2
   },
   "contextCount": 1,
   "entityCount": 1,
   "segmentCount": 0,
   "elementCount": 23,
   "unitCount": 0,
   "baseTaxonomies": {
    "http://xbrl.sec.gov/dei/2025": 22
   },
   "report": {
    "R1": {
     "role": "http://www.ciena.com/role/CoverPage",
     "longName": "0000001 - Document - Cover Page",
     "shortName": "Cover Page",
     "isDefault": "true",
     "groupType": "document",
     "subGroupType": "",
     "menuCat": "Cover",
     "order": "1",
     "firstAnchor": {
      "contextRef": "c-1",
      "name": "dei:DocumentType",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "cien-20250922.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "c-1",
      "name": "dei:DocumentType",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "cien-20250922.htm",
      "first": true,
      "unique": true
     }
    }
   },
   "tag": {
    "dei_AmendmentFlag": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "AmendmentFlag",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Amendment Flag",
        "label": "Amendment Flag",
        "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission."
       }
      }
     },
     "auth_ref": []
    },
    "dei_CityAreaCode": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "CityAreaCode",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "City Area Code",
        "label": "City Area Code",
        "documentation": "Area code of city"
       }
      }
     },
     "auth_ref": []
    },
    "dei_CoverAbstract": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "CoverAbstract",
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Cover [Abstract]",
        "label": "Cover [Abstract]",
        "documentation": "Cover page."
       }
      }
     },
     "auth_ref": []
    },
    "dei_DocumentPeriodEndDate": {
     "xbrltype": "dateItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "DocumentPeriodEndDate",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Document Period End Date",
        "label": "Document Period End Date",
        "documentation": "For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD."
       }
      }
     },
     "auth_ref": []
    },
    "dei_DocumentType": {
     "xbrltype": "submissionTypeItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "DocumentType",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Document Type",
        "label": "Document Type",
        "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressAddressLine1": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityAddressAddressLine1",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Entity Address, Address Line One",
        "label": "Entity Address, Address Line One",
        "documentation": "Address Line 1 such as Attn, Building Name, Street Name"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressCityOrTown": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityAddressCityOrTown",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Entity Address, City or Town",
        "label": "Entity Address, City or Town",
        "documentation": "Name of the City or Town"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressPostalZipCode": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityAddressPostalZipCode",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Entity Address, Postal Zip Code",
        "label": "Entity Address, Postal Zip Code",
        "documentation": "Code for the postal or zip code"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressStateOrProvince": {
     "xbrltype": "stateOrProvinceItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityAddressStateOrProvince",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Entity Address, State or Province",
        "label": "Entity Address, State or Province",
        "documentation": "Name of the state or province."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityCentralIndexKey": {
     "xbrltype": "centralIndexKeyItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityCentralIndexKey",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Entity Central Index Key",
        "label": "Entity Central Index Key",
        "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_EntityEmergingGrowthCompany": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityEmergingGrowthCompany",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Entity Emerging Growth Company",
        "label": "Entity Emerging Growth Company",
        "documentation": "Indicate if registrant meets the emerging growth company criteria."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_EntityFileNumber": {
     "xbrltype": "fileNumberItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityFileNumber",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Entity File Number",
        "label": "Entity File Number",
        "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityIncorporationStateCountryCode": {
     "xbrltype": "edgarStateCountryItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityIncorporationStateCountryCode",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Entity Incorporation, State or Country Code",
        "label": "Entity Incorporation, State or Country Code",
        "documentation": "Two-character EDGAR code representing the state or country of incorporation."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityRegistrantName": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityRegistrantName",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Entity Registrant Name",
        "label": "Entity Registrant Name",
        "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_EntityTaxIdentificationNumber": {
     "xbrltype": "employerIdItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityTaxIdentificationNumber",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Entity Tax Identification Number",
        "label": "Entity Tax Identification Number",
        "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_LocalPhoneNumber": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "LocalPhoneNumber",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Local Phone Number",
        "label": "Local Phone Number",
        "documentation": "Local phone number for entity."
       }
      }
     },
     "auth_ref": []
    },
    "dei_PreCommencementIssuerTenderOffer": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "PreCommencementIssuerTenderOffer",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Pre-commencement Issuer Tender Offer",
        "label": "Pre-commencement Issuer Tender Offer",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act."
       }
      }
     },
     "auth_ref": [
      "r3"
     ]
    },
    "dei_PreCommencementTenderOffer": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "PreCommencementTenderOffer",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Pre-commencement Tender Offer",
        "label": "Pre-commencement Tender Offer",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act."
       }
      }
     },
     "auth_ref": [
      "r5"
     ]
    },
    "dei_Security12bTitle": {
     "xbrltype": "securityTitleItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "Security12bTitle",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Title of 12(b) Security",
        "label": "Title of 12(b) Security",
        "documentation": "Title of a 12(b) registered security."
       }
      }
     },
     "auth_ref": [
      "r0"
     ]
    },
    "dei_SecurityExchangeName": {
     "xbrltype": "edgarExchangeCodeItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "SecurityExchangeName",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Security Exchange Name",
        "label": "Security Exchange Name",
        "documentation": "Name of the Exchange on which a security is registered."
       }
      }
     },
     "auth_ref": [
      "r2"
     ]
    },
    "dei_SolicitingMaterial": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "SolicitingMaterial",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Soliciting Material",
        "label": "Soliciting Material",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act."
       }
      }
     },
     "auth_ref": [
      "r4"
     ]
    },
    "dei_TradingSymbol": {
     "xbrltype": "tradingSymbolItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "TradingSymbol",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Trading Symbol",
        "label": "Trading Symbol",
        "documentation": "Trading symbol of an instrument as listed on an exchange."
       }
      }
     },
     "auth_ref": []
    },
    "dei_WrittenCommunications": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "WrittenCommunications",
     "presentation": [
      "http://www.ciena.com/role/CoverPage"
     ],
     "lang": {
      "en-us": {
       "role": {
        "terseLabel": "Written Communications",
        "label": "Written Communications",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act."
       }
      }
     },
     "auth_ref": [
      "r6"
     ]
    }
   }
  }
 },
 "std_ref": {
  "r0": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "12",
   "Subsection": "b"
  },
  "r1": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r2": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "12",
   "Subsection": "d1-1"
  },
  "r3": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "13e",
   "Subsection": "4c"
  },
  "r4": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "14a",
   "Subsection": "12"
  },
  "r5": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "14d",
   "Subsection": "2b"
  },
  "r6": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Securities Act",
   "Number": "230",
   "Section": "425"
  }
 }
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>14
<FILENAME>0001628280-25-042266-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 0001628280-25-042266-xbrl.zip
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M6AA"@N.1<2JLD O0'&8T!M3.9O-E>J,\T[\%1:[D.>D9\U4H:!7,0,,) EL
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M$K7ORMY!@4<OLPHE=(8HCQ0NA&-8S)Q0B-MT==-&9Y55<@HJB]=_!O@ZS!&
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M<%]>JJ!H_U=+\U]AMO\#4$L#!!0    ( +!,-ELKP,3,8 (  /T&   1
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M602((@RD)(0@(3QD*HXET]9G*9X''P?&2L^S8S;J8$N=GSLOU&R,>>"UZV
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MH>OY?2@T*VJZR/>35]M'LO6O=9Z\^C]02P,$%     @ L$PV6Y]O/4FN!@
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M96%S92YH=&U02P$"% ,4    " "P3#9;>6V9[O 1   9=@  $0
M    @ '@#   8VEE;BTR,#(U,#DR,BYH=&U02P$"% ,4    " "P3#9;*\#$
MS& "  #]!@  $0              @ '_'@  8VEE;BTR,#(U,#DR,BYX<V10
M2P$"% ,4    " "P3#9;!\%'A1L*  !]50  %0              @ &.(0
M8VEE;BTR,#(U,#DR,E]L86(N>&UL4$L! A0#%     @ L$PV6Y]O/4FN!@
MY#   !4              ( !W"L  &-I96XM,C R-3 Y,C)?<')E+GAM;%!+
4!08     !0 % $D!  "],@     !

end
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>15
<FILENAME>cien-20250922_htm.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xml:lang="en-US"
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="cien-20250922.xsd" xlink:type="simple"/>
    <context id="c-1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000936395</identifier>
        </entity>
        <period>
            <startDate>2025-09-22</startDate>
            <endDate>2025-09-22</endDate>
        </period>
    </context>
    <dei:EntityCentralIndexKey contextRef="c-1" id="f-21">0000936395</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag contextRef="c-1" id="f-22">false</dei:AmendmentFlag>
    <dei:DocumentType contextRef="c-1" id="f-1">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="c-1" id="f-2">2025-09-22</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName contextRef="c-1" id="f-3">Ciena Corp</dei:EntityRegistrantName>
    <dei:EntityFileNumber contextRef="c-1" id="f-4">001-36250</dei:EntityFileNumber>
    <dei:EntityIncorporationStateCountryCode contextRef="c-1" id="f-5">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityAddressAddressLine1 contextRef="c-1" id="f-6">7035 Ridge Road</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown contextRef="c-1" id="f-7">Hanover</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince contextRef="c-1" id="f-8">MD</dei:EntityAddressStateOrProvince>
    <dei:EntityTaxIdentificationNumber contextRef="c-1" id="f-9">23-2725311</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressPostalZipCode contextRef="c-1" id="f-10">21076</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode contextRef="c-1" id="f-11">410</dei:CityAreaCode>
    <dei:LocalPhoneNumber contextRef="c-1" id="f-12">694-5700</dei:LocalPhoneNumber>
    <dei:WrittenCommunications contextRef="c-1" id="f-13">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial contextRef="c-1" id="f-14">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer contextRef="c-1" id="f-15">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer contextRef="c-1" id="f-16">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle contextRef="c-1" id="f-17">Common stock, $0.01 par value</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="c-1" id="f-18">CIEN</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="c-1" id="f-19">NYSE</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany contextRef="c-1" id="f-20">false</dei:EntityEmergingGrowthCompany>
</xbrl>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
