Convertible Notes Payable

3 Months Ended

Apr. 30, 2011

Convertible Notes Payable [Abstract]

CONVERTIBLE NOTES PAYABLE

(14) CONVERTIBLE NOTES PAYABLE

     The following table sets forth, in thousands, the carrying value and the estimated current fair value of Ciena’s outstanding convertible notes:

	April 30, 2011
Description	Carrying Value		Fair Value
0.25% Convertible Senior Notes due May 1, 2013	$	216,210	$	221,210
4.0% Convertible Senior Notes due March 15, 2015 (1)		376,324		586,172
0.875% Convertible Senior Notes due June 15, 2017		500,000		496,563
3.75% Convertible Senior Notes due October 15, 2018		350,000		561,094
	$	1,442,534	$	1,865,039

⁽¹⁾ Includes unamortized bond premium related to embedded redemption feature

     The fair value reported above is based on the quoted market price for the notes on the date above.