Open AccessDeterministic access of broadband frequency combs in microresonators using cnoidal waves in the soliton crystal limit
Author(s) -
Zhen Qi,
Amir Leshem,
José A. Jaramillo-Villegas,
Giuseppe D’Aguanno,
Thomas F. Carruthers,
Omri Gat,
Andrew M. Weiner,
Curtis R. Menyuk
Publication year - 2020
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.405655
Subject(s) - physics , soliton , broadband , optics , thermal , parameter space , amplitude , nonlinear system , quantum mechanics , meteorology , statistics , mathematics
We present a method to deterministically obtain broad bandwidth frequency combs in microresonators. These broadband frequency combs correspond to cnoidal waves in the limit when they can be considered soliton crystals or single solitons. The method relies on moving adiabatically through the (frequency detuning)×(pump amplitude) parameter space, while avoiding the chaotic regime. We consider in detail Si 3 N 4 microresonators with small or intermediate dimensions and an SiO 2 microresonator with large dimensions, corresponding to prior experimental work. We also discuss the impact of thermal effects on the stable regions for the cnoidal waves. Their principal effect is to increase the detuning for all the stable regions, but they also skew the stable regions, since higher pump power corresponds to higher power and hence increased temperature and detuning. The change in the detuning is smaller for single solitons than it is for soliton crystals. Without temperature effects, the stable regions for single solitons and soliton crystals almost completely overlap. When thermal effects are included, the stable region for single solitons separates from the stable regions for the soliton crystals, explaining in part the effectiveness of backwards-detuning to obtaining single solitons.