Effect on Kerr comb generation in a clockwise and counter-clockwise mode coupled microcavity

Shun Fujii, Atsuhiro Hori, Takumi Kato, Ryo Suzuki, Yusuke Okabe, Wataru Yoshiki, Akitoshi Chen Jinnai, Takasumi Tanabe

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


We study the impact of inherent mode coupling between clockwise (CW) and counter-clockwise (CCW) modes on Kerr comb generation in a small whispering-gallery mode microcavity. Our numerical analysis using a coupled Lugiato-Lefever equation reveals the range of the coupling strength in which a soliton pulse can be obtained in the CW direction. It also showed that CCW comb power depends on the coupling strength between the CW and CCW modes. In addition to the simulation, we conducted an experiment to confirm that the power ratio between the CW and CCW comb modes depends on the coupling strength, and the experimental results agree well with the simulation results. This study helps us to understand the relationship between CW and CCW mode coupling and Kerr comb generation, and the e ect on soliton formation.

Original languageEnglish
Pages (from-to)28969-28982
Number of pages14
JournalOptics Express
Issue number23
Publication statusPublished - 2017 Nov 13

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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