2017/12/11 by Shun Fujii, Takumi Kato, Ryo Suzuki +3 · 46 citations
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Computer science #Materials science #Mode (computer interface) #Optics #Optoelectronics #Photonic Crystal and Fiber Optics #Photonic and Optical Devices #Physics #Raman spectroscopy #Resonator #Whispering-gallery wave #physics.optics
paper · pdf · doi:10.1364/josab.35.000100
published in Journal of the Optical Society of America B 35(1), 100 (Optica Publishing Group) · 7 pages, 6 figures
openalex publication_date 2017/12/11 · arxiv created 2017/12/13 · arxiv updated 2017/12/14 · openalex created_date 2017/12/22 · openalex updated_date 2026/08/05
We theoretically and experimentally investigated the transition between modulation instability and Raman gain in a small silica microcavity with a large free-spectral range, which reveals that we can selectively switch from a four-wave mixing dominant state to a stimulated Raman scattering dominant state. Both the theoretical analysis and the experiment show that a Raman-dominant region is present between transitions of Kerr combs with different free-spectral range spacings. We can obtain a stable Kerr comb and a stable Raman state selectively by changing the driving power, coupling between the cavity and the waveguide, and laser detuning. Such a controllable transition is achieved thanks to the presence of gain competition between modulation instability and Raman gain in silica whispering gallery mode microcavities.