Journal
OPTICS LETTERS
Volume 39, Issue 4, Pages 900-903Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.39.000900
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- U.S. Office of Naval Research
- National Aeronautics and Space Administration (NASA)
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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. (C) 2014 Optical Society of America
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