Fundamental and third harmonic mode coupling induced single soliton generation in Kerr microresonators

Pan, Jianxing, Cheng, Zhuo, Huang, Tianye, Song, Chaolong, Shum, Perry Ping and Brambilla, Gilberto (2019) Fundamental and third harmonic mode coupling induced single soliton generation in Kerr microresonators. Journal of Lightwave Technology, 37 (21), 5531-5536. (doi:10.1109/JLT.2019.2932903).

Abstract

The single soliton propagating in a microresonator (MRR) is characterized by a smooth spectrum. However, the number of solitons that propagate in an MRR in the anomalous dispersion regime is usually stochastic and gives rise to a complex spectrum. In this paper, we introduce a new passive mechanism based on third-harmonic-induced nonlinear coupling for the formation of a single deterministic soliton in an MRR. We show that with appropriate fundamental and third harmonic mode coupling strength and a slight phase mismatch, deterministic single soliton generation can be realized by simply scanning the detuning of a continuous wave serving as a pump. Under strong mode coupling strength, a relatively smaller wave vector mismatch within suitable range can be used for single soliton generation. Our work provides a potential approach for on-chip generation of coherent optical Kerr combs and efficient THG conversion.

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Contributors

Author: Gilberto Brambilla

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