Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Registration Statement on Form S-1 of our reports dated June 3, 2014, relating to the consolidated financial statements of NeoPhotonics Corporation and subsidiaries (the “Company”), and the effectiveness of the Company’s internal control over financial reporting (which report expresses an adverse opinion on the effectiveness of the Company’s internal control over financial reporting because of material weaknesses), appearing in the Annual Report on Form 10-K of the Company for the year ended December 31, 2013, and to the reference to us under the heading “Experts” in the Prospectus, which is part of this Registration Statement.

/s/ DELOITTE & TOUCHE LLP

San Jose, California

December 19, 2014