Design of a passively mode-locking whispering-gallery-mode microlaser

Tomoki Prugger S.L. Suzuki, Ayata Nakashima, Keigo Nagashima, Rammaru Ishida, Riku Imamura, Shun Fujii, Sze Yun Set, Shinji Yamashita, Takasumi Tanabe

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Ultrahigh-repetition-rate lasers will become vital light sources for many future technologies; however, their realization is challenging because the cavity size must be minimized. Whispering-gallery-mode (WGM) microresonators are attractive for this purpose since they allow the strong light–matter interaction usually needed to enable mode locking. However, the optimum parameter ranges are entirely unknown since no experiments have yet been conducted. Here, we numerically investigate pulsed operation in a toroidal WGM microresonator with gain and saturable absorption (SA) to study the experimental feasibility. We show that dispersion is the key parameter for achieving passive mode locking in this system. Moreover, the design guideline provided in this work can apply to any small resonators with gain and SA and is not limited to a specific cavity system.

Original languageEnglish
Pages (from-to)3172-3178
Number of pages7
JournalJournal of the Optical Society of America B: Optical Physics
Issue number10
Publication statusPublished - 2021 Oct

ASJC Scopus subject areas

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


Dive into the research topics of 'Design of a passively mode-locking whispering-gallery-mode microlaser'. Together they form a unique fingerprint.

Cite this