Hysteresis behavior of Kerr frequency comb generation in a high-quality-factor whispering-gallery-mode microcavity

A numerical and experimental study of Kerr frequency comb generation in a silica toroid microcavity is presented. We use a generalized mean-field Lugiato-Lefever equation and solve it with the split-step Fourier method. We observe that a stable mode-locked regime can be accessed when we reduce the i...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2016-07, Vol.55 (7), p.72201
Main Authors: Kato, Takumi, Chen-Jinnai, Akitoshi, Nagano, Takuma, Kobatake, Tomoya, Suzuki, Ryo, Yoshiki, Wataru, Tanabe, Takasumi
Format: Article
Language:English
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Summary:A numerical and experimental study of Kerr frequency comb generation in a silica toroid microcavity is presented. We use a generalized mean-field Lugiato-Lefever equation and solve it with the split-step Fourier method. We observe that a stable mode-locked regime can be accessed when we reduce the input power after strong pumping due to the bistable nature of the nonlinear cavity system used. The experimental results agree well with the results of the numerical analysis, where we obtain a low-noise Kerr comb spectrum by gradually reducing the pumping input after strong pumping. This finding complements the results obtained by a previous wavelength scanning method and clarifies the procedure for achieving mode-locked states in such high-Q microcavity systems.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.55.072201