Exhibit 23.1
Consent of Independent Registered Public Accounting Firm
Finisar Corporation
Sunnyvale, CA
We hereby consent to the incorporation by reference inII-VI Incorporated’s Registration Statements on FormS-8 (Nos.333-12737,333-129675,333-164827,333-184805,333-199855,333-228367 and333-228368) andII-VI Incorporated’s Registration Statement on FormS-8 pertaining to the Amended and Restated Finisar Corporation 2005 Stock Incentive Plan and Finisar Corporation 401(k) Profit Sharing Plan of our reports dated June 14, 2019, relating to the consolidated financial statements of Finisar Corporation as of April 28, 2019 and April 29, 2018, and for each of the three years in the period ended April 28, 2019, the effectiveness of Finisar Corporation’s internal control over financial reporting as of April 28, 2019, and schedule of Finisar Corporation for each of the three years in the period ended April 28, 2019, incorporated by reference in this current report on Form8-K/A ofII-VI Incorporated from Finisar’s Annual Report (Form10-K) for the year ended April 28, 2019.
/s/ BDO USA, LLP
BDO USA, LLP
San Jose, California
December 9, 2019