Subharmonic instabilities in Kerr microcombs

We report experimental observation of subharmonic mode excitation in primary Kerr optical frequency combs generated using crystalline whispering-gallery mode resonators. We show that the subcombs can be controlled and span a single or multiple free spectral ranges around the primary comb modes. In t...

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Bibliographic Details
Published inOptics letters Vol. 48; no. 3; p. 578
Main Authors Lin, Guoping, Liu, Fengyu, Coillet, Aurélien, Gomila, Damià, Menyuk, Curtis R, Chembo, Yanne K
Format Journal Article
LanguageEnglish
Published United States 01.02.2023
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Summary:We report experimental observation of subharmonic mode excitation in primary Kerr optical frequency combs generated using crystalline whispering-gallery mode resonators. We show that the subcombs can be controlled and span a single or multiple free spectral ranges around the primary comb modes. In the spatial domain, the resulting multiscale combs correspond to an amplitude modulation of intracavity roll patterns. We perform a theoretical analysis based on eigenvalue decomposition that evidences the mechanism leading to the excitation of these combs.
ISSN:1539-4794
DOI:10.1364/OL.476647