We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No.
333-27131,
333-76915,
333-83581,
333-30900,
333-53146,
333-72474,
333-91294,
333-102462,
333-103328,
333-104825,
333-113872,
333-115287,
333-121110,
333-123509,
333-123510,
333-149520 and
333-149929), and on Form S-3 (No.
333-143490,
333-132952,
333-108476 and
333-149519) of Ciena
Corporation of our report dated
December 23, 2008 relating to the financial statements and the
effectiveness of internal control over financial reporting, which appears in this Form 10-K.