Open AccessTransverse mode interaction via stimulated Raman scattering comb in a silica microcavity
Author(s) -
T. Kato,
Atsuhiro Hori,
Ritsuro Suzuki,
Shun Fujii,
Tomoya Kobatake,
Takasumi Tanabe
Publication year - 2017
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.000857
Subject(s) - optics , raman scattering , raman spectroscopy , transverse plane , longitudinal mode , whispering gallery wave , excited state , wavelength , equilibrium mode distribution , mode (computer interface) , transverse mode , materials science , mode volume , physics , optoelectronics , single mode optical fiber , radiation mode , laser , optical fiber , atomic physics , multi mode optical fiber , plastic optical fiber , structural engineering , computer science , engineering , operating system
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.