CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated December 27, 2007 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in Ciena Corporation’s Annual Report on Form 10-K for the year ended October 31, 2007. We also consent to the references to us under the heading “Experts” in such Registration Statement.

/s/ PricewaterhouseCoopers LLP
McLean, Virginia
March 3, 2008