Broadband gain induced Raman comb formation in a silica microresonator

Ryo Suzuki, Akihiro Kubota, Atsuhiro Hori, Shun Fujii, Takasumi Tanabe

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

A high-Q silica whispering gallery mode microresonator is an attractive platform on which to demonstrate a broad and phase-locked Raman comb in various wavelength regimes. Raman combs can be used for applications such as compact pulse laser sources, sensors, optical clocks, and coherence tomography. However, the formation dynamics of a Raman comb has not been well exploited. Here we study the dynamics of the Raman comb formation in silica rod microresonators, which have cavity-free spectral ranges in microwave rates. We generated a Raman comb with a smooth spectral envelope and also observed the transition between two Raman combs located at different center wavelengths. The transition behavior was obtained when we changed the pump detuning and the coupling strength between the microresonator and fiber. We also explain these phenomena by using a simple model based on coupled-mode equations.

Original languageEnglish
Pages (from-to)933-938
Number of pages6
JournalJournal of the Optical Society of America B: Optical Physics
Volume35
Issue number4
DOIs
Publication statusPublished - 2018 Apr 1

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

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