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arXiv · 1610.01143

Dynamics of mode-coupling-induced microresonator frequency combs in normal dispersion

Jae K. Jang·Yoshitomo Okawachi·Mengjie Yu·Kevin Luke·Xingchen Ji·Michal Lipson·Alexander L. Gaeta
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Abstract

We experimentally and theoretically investigate the dynamics of microresonator-based frequency comb generation assisted by mode coupling in the normal group-velocity dispersion (GVD) regime. We show that mode coupling can initiate intracavity modulation instability (MI) by directly perturbing the pump-resonance mode. We also observe the formation of a low-noise comb as the pump frequency is tuned further into resonance from the MI point. We determine the phase-matching conditions that accurately predict all the essential features of the MI and comb spectra, and extend the existing analogy between mode coupling and high-order dispersion to the normal GVD regime. We discuss the applicability of our analysis to the possibility of broadband comb generation in the normal GVD regime.

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Jae K. Jang, Yoshitomo Okawachi, Mengjie Yu, Kevin Luke, Xingchen Ji, Michal Lipson, Alexander L. Gaeta. 2016-10-04. Dynamics of mode-coupling-induced microresonator frequency combs in normal dispersion. https://doi.org/10.1364/oe.24.028794

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