United States securities and exchange commission logo





                          May 17, 2021

       Thomas P. Minichiello
       Chief Financial Officer
       EMCORE CORP
       2015 W. Chestnut Street
       Alhambra, CA 91803

                                                        Re: EMCORE CORP
                                                            S-3 Filed May 13,
2021
                                                            File No. 333-256090

       Dear Mr. Minichiello:

              This is to advise you that we have not reviewed and will not
review your registration
       statement.

               Please refer to Rules 460 and 461 regarding requests for
acceleration. We remind you
       that the company and its management are responsible for the accuracy and
adequacy of their
       disclosures, notwithstanding any review, comments, action or absence of
action by the staff.

                                                        Please contact SiSi
Cheng at 202-551-5004 with any questions.




                          Sincerely,


                          Division of Corporation Finance

                          Office of Manufacturing
       cc:                                              James J. Masetti, Esq.