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Opt Lett. 2009 Apr 1;34(7):878-80.

Generation of optical frequency combs with a CaF2 resonator.

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1
Jet Propulsion Laboratory, Calfornia Institute of Technology, Pasadena, CA 91109, USA. grudinin@caltech.edu

Abstract

We demonstrate optical frequency combs using the fluorite whispering gallery mode resonator as a nonlinear Kerr medium. Two regimes of generation are observed, giving the record low repetition rate of 13 GHz, equal to the cavity's free spectral range (FSR) or high repetition rates of multiples of cavity FSR. An intermediate regime was also observed. Raman lasing spectrum similar to modulation instability in fibers was observed for the first time to the best of our knowledge.

PMID:
19340157
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