<SEC-DOCUMENT>0000899243-23-009433.txt : 20230322
<SEC-HEADER>0000899243-23-009433.hdr.sgml : 20230322
<ACCEPTANCE-DATETIME>20230322190626
ACCESSION NUMBER:		0000899243-23-009433
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20230320
FILED AS OF DATE:		20230322
DATE AS OF CHANGE:		20230322

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Kosaraju Sheela
		CENTRAL INDEX KEY:			0001963781

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36250
		FILM NUMBER:		23754114

	MAIL ADDRESS:	
		STREET 1:		43-51 WORSHIP ST
		CITY:			LONDON
		STATE:			X0
		ZIP:			EC2A 2DX

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CIENA CORP
		CENTRAL INDEX KEY:			0000936395
		STANDARD INDUSTRIAL CLASSIFICATION:	TELEPHONE & TELEGRAPH APPARATUS [3661]
		IRS NUMBER:				232725311
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1028

	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>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
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    <periodOfReport>2023-03-20</periodOfReport>

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    <issuer>
        <issuerCik>0000936395</issuerCik>
        <issuerName>CIENA CORP</issuerName>
        <issuerTradingSymbol>CIEN</issuerTradingSymbol>
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    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001963781</rptOwnerCik>
            <rptOwnerName>Kosaraju Sheela</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CIENA CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>7035 RIDGE RD</rptOwnerStreet2>
            <rptOwnerCity>HANOVER</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>21076</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>See Remarks</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
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            <transactionCoding>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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        <nonDerivativeTransaction>
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            <transactionDate>
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            <transactionAmounts>
                <transactionShares>
                    <value>171</value>
                    <footnoteId id="F4"/>
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                <transactionPricePerShare>
                    <value>50.20</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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                </transactionAcquiredDisposedCode>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>78422</value>
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                    <footnoteId id="F5"/>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
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            <transactionDate>
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                <transactionCode>F</transactionCode>
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                <value></value>
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                <transactionShares>
                    <value>195</value>
                    <footnoteId id="F6"/>
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                <transactionPricePerShare>
                    <value>50.20</value>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
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                <directOrIndirectOwnership>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
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            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
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                <value></value>
            </transactionTimeliness>
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                <transactionShares>
                    <value>866</value>
                    <footnoteId id="F7"/>
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                <transactionPricePerShare>
                    <value>50.20</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a restricted stock unit (RSU) award agreement dated 12/17/2019. Acquisition of the RSU was previously reported in Table I of reporting person's Form 3 filed on 2/3/2023.</footnote>
        <footnote id="F2">Shares reported include unvested Restricted Stock Units (RSUs).</footnote>
        <footnote id="F3">Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a restricted stock unit (RSU) award agreement dated 9/8/2020. Acquisition of the RSU was previously reported in Table I of reporting person's Form 3 on 2/3/2023.</footnote>
        <footnote id="F4">Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a restricted stock unit (RSU) award agreement dated 12/16/2020. Acquisition of the RSU was previously reported in Table I of reporting person's Form 3 filed on 2/3/2023.</footnote>
        <footnote id="F5">Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a restricted stock unit (RSU) award agreement dated 12/14/2021. Acquisition of the RSU was previously reported in Table I of reporting person's Form 3 filed on 2/3/2023.</footnote>
        <footnote id="F6">Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a restricted stock unit (RSU) award agreement dated 12/13/2022. Acquisition of the RSU was previously reported in Table I of reporting person's Form 3 filed on 2/3/2023.</footnote>
        <footnote id="F7">Represents shares withheld to cover payment of the tax liabilities of the reporting person related to a restricted stock unit (RSU) award agreement dated 2/1/2023. Acquisition of the RSU was previously reported in Table I of the reporting person's Form 4 filed on 2/03/2023.</footnote>
    </footnotes>

    <remarks>SVP, General Counsel and Assistant Secretary</remarks>

    <ownerSignature>
        <signatureName>By: Michelle Rankin For: Sheela Kosaraju</signatureName>
        <signatureDate>2023-03-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
