SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* HJARTARSON GUDMUNDUR (Last) (First) (Middle) 1201 WINTERSON ROAD (Street) LINTHICUM MD 21090 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol CIENA CORP [ CIEN ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) Sr VP and GM Broadband Access
	3. Date of Earliest Transaction (Month/Day/Year) 09/03/2004
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/03/2004		M		143,279	A	$0.3	715,159	D
Common Stock	09/03/2004		M		42	A	$0.3	715,201	D
Common Stock	09/03/2004		M		106,679	A	$0.3	821,880	D
Common Stock	09/03/2004		S		250,000	D	$1.7979	571,880	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option (right to buy)	$0.3	09/03/2004		M			143,279	01/29/2002(1)	01/28/2012	Common Stock	143,279	$0	78,571	D
Employee Stock Option (right to buy)	$0.3	09/03/2004		M			42	01/29/2003(2)	01/28/2013	Common Stock	42	$0	56	D
Employee Stock Option (right to buy)	$0.3	09/03/2004		M			106,679	07/23/2003(3)	07/23/2013	Common Stock	106,679	$0	1,054,655	D

Explanation of Responses:

1. These options were inssued pursuant to the terms of the merger between Catena and CIENA upon conversion of an option granted under the Catena 1998 Equity Incentive Plan and such option to have the same terms and conditions as in effect immediately prior to the effective time of the merger, these options will vest over forty-eight months from the grant date of 1/29/2002.

2. These options were inssued pursuant to the terms of the merger between Catena and CIENA upon conversion of an option granted under the Catena 1998 Equity Incentive Plan and such option to have the same terms and conditions as in effect immediately prior to the effective time of the merger, these options will vest over forty-eight months from the grant date of 1/29/2003.

3. These options were inssued pursuant to the terms of the merger between Catena and CIENA upon conversion of an option granted under the Catena 1998 Equity Incentive Plan and such option to have the same terms and conditions as in effect immediately prior to the effective time of the merger, these options will vest over forty-eight months from the grant date of 7/23/2003.

	/s/Gudmundur Hjartarson/Anita Weiskerger per POA	09/07/2004
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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