Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
SMITH GARY B
   2. Issuer Name and Ticker or Trading Symbol
CIENA CORP [CIEN] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
PRESIDENT, CEO
(Last)
(First)
(Middle)
C/O CIENA CORPORATION, 1201 WINTERSON ROAD		 3. Date of Earliest Transaction (Month/Day/Year)
03/27/2008
(Street)

LINTHICUM,, MD 21090		 4. If Amendment, Date 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
(City)
(State)
(Zip)
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 03/27/2008   M   3,920 A $ 19.95 173,119 D  
Common Stock 03/27/2008   M   15,280 A $ 16.52 188,399 D  
Common Stock 03/27/2008   S   19,200 D $ 31.1285 (1) 169,199 D  

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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 Underlying Securities
(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 of Derivative Security: 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
Non-Qualified Stock Option (right to buy) $ 16.52 03/27/2008   M     15,280   (2) 11/02/2015 Common Stock 15,280 $ 0 76,237 D  
Non-Qualified Stock Option (right to buy) $ 19.95 03/27/2008   M     3,920   (3) 12/10/2014 Common Stock 3,920 $ 0 3,840 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
SMITH GARY B
C/O CIENA CORPORATION
1201 WINTERSON ROAD
LINTHICUM,, MD 21090		   X     PRESIDENT, CEO  

Signatures

 By: Erik Lichter For: Gary B. Smith   03/28/2008
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) Reflects the average sale price of the total shares sold. Actual sale prices are as follows: 300 shares at $31.22; 300 shares at $31.24; 700 shares at $31.23; 500 shares at $31.26; 1,300 shares at $31.15; 313 shares at $31.18; 700 shares at $31.16; 2,600 shares at $31.03; 500 shares at $31.07; 1,100 shares at $31.14; 400 shares at $31.09; 492 shares at $31.10; 708 shares at $31.04; 1,600 shares at $30.99; 950 shares at $31.00; 300 shares at $30.98; 200 shares at $30.97; 400 shares at $31.02; 700 shares at $31.01; 500 shares at $31.08; 200 shares at $31.30; 87 shares at $31.18; 50 shares at $31.03; 200 shares at $31.21; 200 shares at $30.99; 100 shares at $31.35; 300 shares at $31.36; 200 shares at $31.33; 500 shares at $31.34; 1,300 shares at $31.28; 600 shares at $31.25; 500 shares at $31.27; 100 shares at $31.30; and 300 shares at $31.31.
(2) Option vests in equal monthly amounts over 48 months beginning on November 1, 2005.
(3) Option is fully vested.

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