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EXHIBIT 10.13

AMENDMENT TO
MANAGEMENT RETENTION AGREEMENT

WHEREAS, Stratos Lightwave, Inc., a Delaware corporation (the
Corporation) and David A. Slack (Executive) entered into a Management
Retention Agreement entered into on or about October 17, 2002 (the Agreement);

WHEREAS, the Corporation and the Executive wish to amend the Agreement
to expand what constitutes a Change of Control under the Agreement; and

WHEREAS, Section 9(b) of the Management Retention Agreement
provides that it can be amended at any time by a written agreement executed by
the Executive and an authorized officer of the Corporation.

NOW, THEREFORE, BE IT RESOLVED, that the Management Retention Agreement
between the Corporation and David A. Slack be and it hereby is amended to revise
Section 5(c)(iii) thereof to read as follows, effective immediately;



| |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
| | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| | (iii) The consummation of a merger or consolidation of the
Company with any other corporation, other than a merger or
consolidation which would result in the Companys voting securities
outstanding immediately prior thereto continuing to represent (either
by remaining outstanding or by being converted into voting securities
of the surviving entity or its parent) at least sixty percent (60%) of
the total voting power represented by the Companys voting securities
or such surviving entity or its parent outstanding immediately after
such merger or consolidation; or

IN WITNESS WHEREOF, each of the parties has executed this Agreement, in
the case of the Company by its duly authorized officer, as of the day and year
set forth below.

|                        |  |                         |  |     |  |                   
|----------------------- |  | ----------------------- |  | --- |  | ------------------
|STRATOS LIGHTWAVE, INC. |  | EXECUTIVE              
|                       
|By:                     |  | /s/ James W. McGinley   |  | By: |  | /s/ David A. Slack
|Name:                   |  | /s/ James W. McGinley   |  |     |  | David A. Slack    
|Title:                  |  | Chief Executive Officer |  |     |  |                   
|                       
|Date:                   |  | July 1, 2003            |  |     |  |