POWER OF ATTORNEY

I, Michael E. Lavin, of 1199 Lincoln Avenue South, Highland Park, IL  60035,
hereby appoint James M. Sheehan of 1415 West Diehl Road, Naperville, Illinois
60563, or Wendy S. Jennings of 1465 N. McDowell Blvd., Petaluma, California
94954, as attorney-in-fact to act for me and in my name for the purpose of
completing, signing and filing, in my name and on my behalf, any of the
following forms pursuant to the terms of Securities Exchange Act of 1934 and
the Securities Act of 1933:


	Form 3 - Initial Statement of Beneficial Ownership of Securities

	Form 4 - Statement of Changes of Beneficial Ownership of Securities

	Form 5 - Annual Statement of Beneficial Ownership of Securities

	Form 144 - Notice of Proposed Sale of Securities


This power shall become effective on January 3, 2005, and shall continue in
effect until terminated in writing by me or until either of my attorneys-in-
fact shall die, become legally disabled, terminate their employment with
Tellabs, Inc. or its subsidiaries for any reason, resign or refuse to act.

I am fully informed as to all the contents of this form and understand the
full import of this grant of powers to either of my attorneys-in-fact.

This Power of Attorney shall supersede any previously granted power related to
the subject matter herein.


/s/ Michael E. Lavin
___________________________________________
Michael E. Lavin


State of Illinois)
		     ) SS
County of Kane   )


NOTARY

The undersigned, a notary public in and for the above county and state, this
19th day of January, 2005, certifies that Michael E. Lavin, known to me to be
the same person whose name is subscribed to the foregoing Power of Attorney,
appeared before me in person and acknowledged signing and delivering said
document as his/her free and voluntary act, for the uses and purposes therein
set forth.


/s/ Mary T. McShane
___________________________________________
Notary Public