Effect of Raman scattering and mode coupling in Kerr comb generation in a silica whispering gallery mode microcavity

Takasumi Tanabe, Takumi Kato, Shun Fujii, Ryo Suzuki, Atsuhiro Hori

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

2 Citations (Scopus)

Abstract

We investigated the effect of Raman scattering in multimode whispering gallery mode (WGM) microcavities. First, we discuss the competition between the effects of four-wave mixing (FWM) and stimulated Raman scattering (SRS). Thanks to the different gain bandwidths of FWM and SRS, we can switch between the FWM and SRS dominant states by changing the pump power or by changing the coupling quality factor (Q). Next, we investigated the transverse mode interaction that occurs during SRS comb formation. We found that transverse mode coupling occurred when we pumped in a low-Q mode but a comb with a single-mode family was generated when we pumped in a high-Q mode. This finding will allow us to obtain or suppress a dual comb in a single WGM microcavity. Finally, we demonstrated broad bandwidth visible light generation by third harmonic generation (THG) following the generation of a broadband SRS comb. The generation and good understanding of the SRS comb will offer us various possibilities such as dual comb generation and broad bandwidth visible light generation.

Original languageEnglish
Title of host publicationLaser Resonators, Microresonators, and Beam Control XIX 2017
PublisherSPIE
Volume10090
ISBN (Electronic)9781510606210
DOIs
Publication statusPublished - 2017
EventLaser Resonators, Microresonators, and Beam Control XIX 2017 - San Francisco, United States
Duration: 2017 Jan 302017 Feb 2

Other

OtherLaser Resonators, Microresonators, and Beam Control XIX 2017
CountryUnited States
CitySan Francisco
Period17/1/3017/2/2

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Keywords

  • Kerr comb
  • Microcavity
  • Optical nonlinearity
  • Raman effect
  • Whispering gallery mode

ASJC Scopus subject areas

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

Cite this

Tanabe, T., Kato, T., Fujii, S., Suzuki, R., & Hori, A. (2017). Effect of Raman scattering and mode coupling in Kerr comb generation in a silica whispering gallery mode microcavity. In Laser Resonators, Microresonators, and Beam Control XIX 2017 (Vol. 10090). [100900F] SPIE. https://doi.org/10.1117/12.2250231