Open AccessRaman-Kerr frequency combs in microresonators with normal dispersion
Author(s) -
A. V. Cherenkov,
Nikita M. Kondratiev,
Valery E. Lobanov,
Artem E. Shitikov,
Dmitry V. Skryabin,
M. L. Gorodetsky
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.031148
Subject(s) - raman scattering , raman spectroscopy , optics , physics , kerr effect , four wave mixing , dispersion (optics) , instability , cascade , nonlinear optics , laser , chemistry , nonlinear system , quantum mechanics , chromatography
We generalize the coupled mode formalism to study the generation of frequency combs in microresonators with simultaneous Raman and Kerr nonlinearities and investigate an impact of the former on the formation of frequency combs and dynamics of platicons in the regime of the normal group velocity dispersion. We demonstrate that the Raman effect initiates generation of sidebands, which cascade further in four-wave mixing and reshape into the Raman-Kerr frequency combs. We reveal that the Raman scattering induces a strong instability of the platicon pulses associated with the Kerr effect and normal dispersion. This instability results in branching of platicons and complex spatiotemporal dynamics.