Form: SC 13G

Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions

January 18, 2006

EX-99.I: JOINT FILING AGREEMENT

Published on January 18, 2006


SCHEDULE 13G
CUSIP NO. 290846104 PAGE 10 OF 10 PAGES


Exhibit I

JOINT FILING AGREEMENT

This will confirm the agreement by and among the undersigned that the
Schedule 13G filed with the Securities and Exchange Commission on or about the
date hereof with respect to the beneficial ownership by the undersigned of the
Common Stock, no par value, of EMCORE Corporation, a New Jersey corporation, is
being filed, and all amendments thereto will be filed, on behalf of each of the
persons and entities named below in accordance with Rule 13d-1(k) under the
Securities Exchange Act of 1934, as amended. This Agreement may be executed in
two or more counterparts, each of which shall be deemed an original, but all of
which together shall constitute one and the same instrument.

Dated as of January 17, 2006

ALEXANDRA GLOBAL MASTER FUND LTD.

By: ALEXANDRA INVESTMENT MANAGEMENT, LLC,
its Investment Advisor


By: /s/ Mikhail A. Filimonov
-------------------------------------
Mikhail A. Filimonov
Title: Managing Member


ALEXANDRA INVESTMENT MANAGEMENT, LLC


By: /s/ Mikhail A. Filimonov
-------------------------------------
Mikhail A. Filimonov
Title: Managing Member


/s/ Mikhail A. Filimonov
-----------------------------------------
Mikhail A. Filimonov


/s/ Dimitri Sogoloff
-----------------------------------------
Dimitri Sogoloff


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