Abstract

We experimentally demonstrate bidirectional Raman soliton-like combs in a whispering gallery mode microresonator with a unidirectional pump for the first time, to the best of our knowledge. We develop a relatively simple theoretical model and find an analytical solution for forward- and backward-propagating Raman sech²-shaped solitons in an anomalous dispersion region under unidirectional pumping in a normal dispersion region. Raman solitons exist, thanks to the balance between losses and Raman gain from a CW wave (which is equal in both directions) as well as between dispersion and Kerr nonlinearity.

© 2024 Optica Publishing Group

Soliton blockade in bidirectional microresonators

Zhiwei Fan and Dmitry V. Skryabin
Opt. Lett. 45(23) 6446-6449 (2020)

Octave soliton microcombs in lithium niobate microresonators

Pi-Yu Wang, Shuai Wan, Rui Ma, Wei Li, Fang Bo, Guang-Can Guo, and Chun-Hua Dong
Opt. Lett. 49(7) 1729-1732 (2024)

Raman pure quartic solitons in Kerr microresonators

Kewei Liu, Shunyu Yao, and Changxi Yang
Opt. Lett. 46(5) 993-996 (2021)

Soliton trapping and comb self-referencing in a single microresonator with χ⁽²⁾ and χ⁽³⁾ nonlinearities

Xiaoxiao Xue, Xiaoping Zheng, and Andrew M. Weiner
Opt. Lett. 42(20) 4147-4150 (2017)

Optimizing auxiliary laser heating for Kerr soliton microcomb generation

Yanlan Xiao, Sirong Qian, Qingsong Bai, Huashun Wen, Yong Geng, Yan Wang, Hongan Lai, Baicheng Yao, Kun Qiu, Jing Xu, and Heng Zhou
Opt. Lett. 49(5) 1129-1132 (2024)