Coherent (COHR) 10-K 2017 FY Annual report

Exhibit 32.01

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of II-VI Incorporated (the “Corporation”) on Form 10-K for the year ended June 30, 2017 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned officer of the Corporation certifies, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to his knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Corporation.

Date: August 21, 2017	/s/ Vincent D. Mattera Jr.
	Vincent D. Mattera Jr.
	President and Chief Executive Officer

* This certification is made solely for purposes of 18 U.S.C. Section 1350, subject to the knowledge standard contained therein, and not for any other purpose.