Strong interactions between solitons and background light in Brillouin-Kerr microcombs

Menghua Zhang, Shulin Ding, Xinxin Li, Keren Pu, Shujian Lei, Min Xiao and Xiaoshun Jiang ()
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Menghua Zhang: Nanjing University
Shulin Ding: Nanjing University
Xinxin Li: Nanjing University
Keren Pu: Nanjing University
Shujian Lei: Nanjing University
Min Xiao: Nanjing University
Xiaoshun Jiang: Nanjing University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Dissipative Kerr-soliton combs are laser pulses regularly sustained by a localized solitary wave on top of a continuous-wave background inside a nonlinear resonator. Usually, the intrinsic interactions between the background light and solitons are weak and localized. Here, we demonstrate a strong interaction between the generated soliton comb and the background light in a Brillouin-Kerr microcomb system. This strong interaction enables the generation of a monostable single-soliton microcomb on a silicon chip. Also, new phenomena related to soliton physics including solitons hopping between different states as well as controlling the formations of the soliton states by the pump power, are observed owing to such strong interaction. Utilizing this monostable single-soliton microcomb, we achieve the 100% deterministic turnkey operation successfully without any feedback controls. Importantly, it allows to output turnkey ultra-low-noise microwave signals using a free-running pump.

Date: 2024
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DOI: 10.1038/s41467-024-46026-z

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