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Opt Express. 2016 Jun 13;24(12):13044-50. doi: 10.1364/OE.24.013044.

Coherent mid-infrared frequency combs in silicon-microresonators in the presence of Raman effects.

Optics express

Austin G Griffith, Mengjie Yu, Yoshitomo Okawachi, Jaime Cardenas, Aseema Mohanty, Alexander L Gaeta, Michal Lipson

PMID: 27410323 DOI: 10.1364/OE.24.013044

Abstract

We demonstrate the first low-noise mid-IR frequency comb source using a silicon microresonator. Our observation of strong Raman scattering lines in the generated comb suggests that interplay between Raman and four-wave mixing plays a role in the generated low-noise state. In addition, we characterize, the intracavity comb generation dynamics using an integrated PIN diode, which takes advantage of the inherent three-photon absorption process in silicon.

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