Harmonic mode locking in a high-Q whispering gallery mode microcavity

Takasumi Tanabe, Takumi Kato, Tomoya Kobatake, Ryo Suzuki, Akitoshi Chen-Jinnai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationLaser Resonators, Microresonators, and Beam Control XVIII
PublisherSPIE
Volume9727
ISBN (Electronic)9781628419627
DOIs
Publication statusPublished - 2016
EventLaser Resonators, Microresonators, and Beam Control XVIII - San Francisco, United States
Duration: 2016 Feb 152016 Feb 18

Other

OtherLaser Resonators, Microresonators, and Beam Control XVIII
CountryUnited States
CitySan Francisco
Period16/2/1516/2/18

Fingerprint

Whispering Gallery Modes
Whispering gallery modes
Mode-locking
Laser mode locking
Microcavity
Microcavities
whispering gallery modes
locking
Q factors
Harmonic
harmonics
pumping
Fourier Method
Silica
Silicon Dioxide
toroids
Mean Field
Pump
Spacing
Numerical analysis

Keywords

  • all-optical switching
  • Kerr comb
  • microcavity
  • mode locking
  • optical nonlinearity
  • Whispering gallery mode

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

Tanabe, T., Kato, T., Kobatake, T., Suzuki, R., & Chen-Jinnai, A. (2016). Harmonic mode locking in a high-Q whispering gallery mode microcavity. In Laser Resonators, Microresonators, and Beam Control XVIII (Vol. 9727). [97270C] SPIE. https://doi.org/10.1117/12.2208754

Harmonic mode locking in a high-Q whispering gallery mode microcavity. / Tanabe, Takasumi; Kato, Takumi; Kobatake, Tomoya; Suzuki, Ryo; Chen-Jinnai, Akitoshi.

Laser Resonators, Microresonators, and Beam Control XVIII. Vol. 9727 SPIE, 2016. 97270C.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Tanabe, T, Kato, T, Kobatake, T, Suzuki, R & Chen-Jinnai, A 2016, Harmonic mode locking in a high-Q whispering gallery mode microcavity. in Laser Resonators, Microresonators, and Beam Control XVIII. vol. 9727, 97270C, SPIE, Laser Resonators, Microresonators, and Beam Control XVIII, San Francisco, United States, 16/2/15. https://doi.org/10.1117/12.2208754
Tanabe T, Kato T, Kobatake T, Suzuki R, Chen-Jinnai A. Harmonic mode locking in a high-Q whispering gallery mode microcavity. In Laser Resonators, Microresonators, and Beam Control XVIII. Vol. 9727. SPIE. 2016. 97270C https://doi.org/10.1117/12.2208754
Tanabe, Takasumi ; Kato, Takumi ; Kobatake, Tomoya ; Suzuki, Ryo ; Chen-Jinnai, Akitoshi. / Harmonic mode locking in a high-Q whispering gallery mode microcavity. Laser Resonators, Microresonators, and Beam Control XVIII. Vol. 9727 SPIE, 2016.
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