POWER OF ATTORNEY

      The  undersigned  hereby  constitutes  and appoints each of John Ambroseo,
Kevin  Palatnik, Bret DiMarco, Jose Macias, Chris O'Harra and Rhonda Fassbender,
signing singly, the undersigned's true and lawful attorney-in-fact to:

      (1)   execute  for  and on behalf of the undersigned, in the undersigned's
            capacity  as  an  officer  and/or  director  of  Coherent, Inc. (the
            "COMPANY"),  Forms  3,  4  and  5  (including amendments thereto) in
            accordance with Section 16(a) of the Securities Exchange Act of 1934
            and  the  rules  and  regulations  thereunder and a Form ID, Uniform
            Application for Access Codes to File on Edgar;

      (2)   do and perform any and all acts for and on behalf of the undersigned
            which may be necessary or desirable to complete and execute any such
            Forms  3,  4  or  5 or Form ID and timely file such forms (including
            amendments   thereto)   and   application  with  the  United  States
            Securities and Exchange Commission and any stock exchange or similar
            authority; and

      (3)   take  any other action of any type whatsoever in connection with the
            foregoing  which, in the opinion of such attorney-in-fact, may be of
            benefit  to,  in  the  best interest of, or legally required by, the
            undersigned, it being understood that the documents executed by such
            attorney-in-fact on behalf of the undersigned pursuant to this Power
            of  Attorney  shall be in such form and shall contain such terms and
            conditions   as   such   attorney-in-fact   may   approve   in  such
            attorney-in-fact's discretion.

      The undersigned hereby grants to each such attorney-in-fact full power and
authority  to  do  and perform any and every act and thing whatsoever requisite,
necessary  or  proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could  do  if personally present, with full power of substitution or revocation,
hereby  ratifying  and  confirming  all  that  such  attorney-in-fact,  or  such
attorney-in-fact's  substitute  or substitutes, shall lawfully do or cause to be
done  by  virtue  of  this  power  of  attorney and the rights and powers herein
granted.  The  undersigned acknowledges that the foregoing attorneys-in-fact, in
serving  in  such  capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to comply
with Section 16 of the Securities Exchange Act of 1934.

      The  undersigned  agrees  that  each such attorney-in-fact herein may rely
entirely  on  information  furnished  orally or in writing by the undersigned to
such  attorney-in-fact.  The  undersigned  also  agrees  to  indemnify  and hold
harmless  the Company and each such attorney-in-fact against any losses, claims,
damages  or  liabilities (or actions in these respects) that arise out of or are
based  upon  any  untrue  statements  or  omission  of  necessary  facts  in the
information provided by the undersigned to such attorney-in fact for purposes of
executing,  acknowledging,  delivering  or  filing  Forms  3,  4 or 5 (including
amendments  thereto)  or  Form  ID  and agrees to reimburse the Company and such
attorney-in-fact  for  any  legal  or  other  expenses  reasonably  incurred  in
connection with investigating or defending against any such loss, claim, damage,
liability or action.

      This  Power  of  Attorney  supersedes  any  power  of  attorney previously
executed  by  the  undersigned  regarding  the  purposes  outlined  in the first
paragraph  hereof  ("PRIOR  POWERS  OF  ATTORNEY"),  and  the  authority  of the
attorneys-in-fact named in any Prior Powers of Attorney is hereby revoked.

      This  Power  of  Attorney  shall remain in full force and effect until the
undersigned  is  no  longer required to file Forms 3, 4 or 5 with respect to the
undersigned's  holdings of and transactions in securities issued by the Company,
unless  earlier  (a) revoked by the undersigned in a signed writing delivered to
the  foregoing  attorneys-in-fact  or  (b) superseded by a new power of attorney
regarding  the  purposes  outlined  in  the first paragraph hereof dated as of a
later date.

      IN  WITNESS  WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 2nd day of March, 2017.

                               /s/ Stephen A. Skaggs
                               ------------------------------------
                               Name:  Stephen A. Skaggs