Abstract
Optical frequency combs in microresonators [1] or microcombs have generated significant attention in recent decades. Specifically, microcombs can be generated by resonantly coupling a powerful CW laser light in a microcavity, inducing multiple frequency oscillation by parametric generation. A well-known route to comb generation starts from the modulation instability (MI) of the pump. MI generates coherent lines spaced by more than one free spectral range of the microcavity [2]. This kind of optical spectrum is generally referred to as a Type I comb [3], and it is usually coherent. Type II combs are generated at higher powers, and consist of a cascaded generation from the original Type I comb. Usually such combs are incoherent [3]. Similar spectra with coherent properties are also observed during the interaction of multiple cavity solitons [4].
© 2017 IEEE
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