TY - GEN
T1 - Harmonic mode locking in a high-Q whispering gallery mode microcavity
AU - Tanabe, Takasumi
AU - Kato, Takumi
AU - Kobatake, Tomoya
AU - Suzuki, Ryo
AU - Chen-Jinnai, Akitoshi
N1 - Publisher Copyright:
© 2016 SPIE.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2016
Y1 - 2016
N2 - We present a numerical and experimental study of the generation of harmonic mode locking in a silica toroid microcavity. We use a generalized mean-field Lugiato-Lefever equation and solve it with the split-step Fourier method. We found that a stable harmonic mode-locking regime can be accessed when we reduce the input power after strong pumping even if we do not carefully adjust the wavelength detuning. This is due to the bistable nature of the nonlinear cavity system. The experiment agrees well with the numerical analysis, where we obtain a low-noise Kerr comb spectrum with a narrow longitudinal mode spacing by gradually reducing the input pump power after strong pumping. This finding clarifies the procedure for generating harmonic mode locking in such high-Q microcavity systems.
AB - We present a numerical and experimental study of the generation of harmonic mode locking in a silica toroid microcavity. We use a generalized mean-field Lugiato-Lefever equation and solve it with the split-step Fourier method. We found that a stable harmonic mode-locking regime can be accessed when we reduce the input power after strong pumping even if we do not carefully adjust the wavelength detuning. This is due to the bistable nature of the nonlinear cavity system. The experiment agrees well with the numerical analysis, where we obtain a low-noise Kerr comb spectrum with a narrow longitudinal mode spacing by gradually reducing the input pump power after strong pumping. This finding clarifies the procedure for generating harmonic mode locking in such high-Q microcavity systems.
KW - Kerr comb
KW - Whispering gallery mode
KW - all-optical switching
KW - microcavity
KW - mode locking
KW - optical nonlinearity
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U2 - 10.1117/12.2208754
DO - 10.1117/12.2208754
M3 - Conference contribution
AN - SCOPUS:84982107448
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Laser Resonators, Microresonators, and Beam Control XVIII
A2 - Kudryashov, Alexis V.
A2 - Paxton, Alan H.
A2 - Ilchenko, Vladimir S.
A2 - Aschke, Lutz
PB - SPIE
T2 - Laser Resonators, Microresonators, and Beam Control XVIII
Y2 - 15 February 2016 through 18 February 2016
ER -