中国物理B ›› 2021, Vol. 30 ›› Issue (2): 24210-0.doi: 10.1088/1674-1056/abc3b4

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  • 收稿日期:2020-08-13 修回日期:2020-09-24 接受日期:2020-10-22 出版日期:2021-01-18 发布日期:2021-01-26

Analysis of dark soliton generation in the microcavity with mode-interaction

Xin Xu(徐昕)†, Xueying Jin(金雪莹), Jie Cheng(程杰), Haoran Gao(高浩然), Yang Lu(陆洋), and Liandong Yu(于连栋)   

  1. School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China
  • Received:2020-08-13 Revised:2020-09-24 Accepted:2020-10-22 Online:2021-01-18 Published:2021-01-26
  • Contact: Corresponding author. E-mail: xuxin@hfut.edu.cn
  • Supported by:
    Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 51705121) and the National Key Research and Development Program of China (Grant No. SQ2019YFE010747).

Abstract: Mode-interaction plays an important role in the dark soliton generation in the microcavity. It is beneficial to the excitation of dark solitons, but also facilitates a variety of dark soliton states. Based on the non-normalized Lugiato-Lefever equation, the evolution of dark soliton in the microcavity with mode-interaction is investigated. By means of mode-interaction, the initial continuous wave (CW) field evolves into a dark soliton gradually, and the spectrum expands from a single mode to a broadband comb. After changing the mode-interaction parameters, the original modes which result in dual circular dark solitons inside the microcavity, are separated from the resonant mode by 2 free spectral ranges (FSR). When the initial field is another feasible pattern of weak white Gaussian noise, the large frequency detuning leads to the amplification of the optical power in the microcavity, and the mode-interaction becomes stronger. Then, multiple dark solitons, which correspond to the spectra with multi-FSR, can be excited by selecting appropriate mode-interaction parameters. In addition, by turning the mode-interaction parameters, the dark soliton number can be regulated, and the comb tooth interval in the spectrum also changes accordingly. Theoretical analysis results are significant for studying the dark soliton in the microcavity with mode-interaction.

Key words: dark soliton, microcavity, mode-interaction

中图分类号:  (Lasers)

  • 42.55.-f
42.65.Tg (Optical solitons; nonlinear guided waves) 42.65.Sf (Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics)