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Published February 15, 2014 | Published
Journal Article Open

Fractional-length sync-pumped degenerate optical parametric oscillator for 500-MHz 3-μm mid-infrared frequency comb generation

Abstract

We demonstrate a mid-IR frequency comb centered at 3120 nm with 650-nm (20-THz) bandwidth at a comb-teeth spacing of 500 MHz. The generated comb is based on a compact ring-type synchronously pumped optical parametric oscillator (SPOPO) operating at degeneracy and pumped by a mode-locked Er-doped 1560 nm fiber laser at a repetition rate of 100 MHz. We achieve high-repetition rate by using a fractional-length cavity with a roundtrip length of 60 cm, which is one-fifth of the length dictated by conventional synchronous pumping.

Additional Information

© 2014 Optical Society of America. Received December 3, 2013; accepted December 22, 2013; posted January 6, 2014 (Doc. ID 202507); published February 10, 2014. The authors thank Vladimir Pervak and the German Research Foundation Cluster of Excellence "Munich Centre for Advanced Photonics." We gratefully acknowledge support from the U.S. Office of Naval Research and The National Aeronautics and Space Administration (NASA).

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August 19, 2023
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