Transverse mode interaction via stimulated Raman scattering comb in a silica microcavity

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

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


Comb generation in different mode families via a stimulated Raman scattering (SRS) process is studied using a silica toroid microcavity. The broad gain bandwidth of SRS in silica allows us to excite longitudinal modes at long wavelengths belonging to mode families that are either the same as or different from the pump mode. We found through experiment and numerical analysis, that an SRS comb in a different mode family with a high quality factor (Q) is excited when we pump in a low-Q mode. No transverse mode interaction occurs when we excite in a high-Q mode resulting the generation of a single comb family. We studied the condition of the transverse mode interaction while varying the mode overlap and Q of the Raman mode. Our experimental results are in good agreement with the analysis and this enables us to control the generation of one- and two-mode combs.

Original languageEnglish
Pages (from-to)857-866
Number of pages10
JournalOptics Express
Issue number2
Publication statusPublished - 2017 Jan 23

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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