Bi-material crystalline whispering gallery mode microcavity structure for thermo-opto-mechanical stabilization

Hiroki Itobe, Yosuke Nakagawa, Yuta Mizumoto, Hiroi Kangawa, Yasuhiro Kakinuma, Takasumi Tanabe

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

We fabricated a calcium fluoride (CaF2) whispering gallery mode (WGM) microcavity with a computer controlled ultra-precision cutting process. We observed a thermo-opto-mechanical (TOM) oscillation in the CaF2 WGM microcavity, which may influence the stability of the optical output when the cavity is employed for Kerr comb generation. We studied experimentally and numerically the mechanism of the TOM oscillation and showed that it is strongly dependent on cavity diameter. In addition, our numerical study suggests that a microcavity structure fabricated with a hybrid material (i.e. CaF2 and silicon), which is compatible with an ultra-high Q and high thermal conductivity, will allow us to reduce the TOM oscillation and stabilize the optical output.

Original languageEnglish
Article number055116
JournalAIP Advances
Volume6
Issue number5
DOIs
Publication statusPublished - 2016 May 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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