中国物理B ›› 2025, Vol. 34 ›› Issue (3): 34203-034203.doi: 10.1088/1674-1056/ada43c

• • 上一篇    

Pure-quartic soliton molecules in normal fourth-order dispersion regimes based on spectral filtering effect

Han-Yang Shen(申翰阳), Rui-Bo Lan(蓝睿博), Hong-Bin Hu(胡洪彬), Yang Li(李阳), Rui Zhou(周瑞), and Zu-Xing Zhang(张祖兴)   

  1. Advanced Photonic Technology Laboratory, College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China
  • 收稿日期:2024-11-14 修回日期:2024-12-27 发布日期:2025-02-18
  • 通讯作者: Zu-Xing Zhang E-mail:zxzhang@njupt.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 62175116).

Pure-quartic soliton molecules in normal fourth-order dispersion regimes based on spectral filtering effect

Han-Yang Shen(申翰阳), Rui-Bo Lan(蓝睿博), Hong-Bin Hu(胡洪彬), Yang Li(李阳), Rui Zhou(周瑞), and Zu-Xing Zhang(张祖兴)   

  1. Advanced Photonic Technology Laboratory, College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China
  • Received:2024-11-14 Revised:2024-12-27 Published:2025-02-18
  • Contact: Zu-Xing Zhang E-mail:zxzhang@njupt.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 62175116).

摘要: Recent theoretical verification of self-similar and dissipative pure-quartic solitons (PQSs) emphasized the similarity between PQS lasers and conventional fiber lasers, but the unique equilibrium mechanism hinders the formation of PQS molecules in normal fourth-order dispersion (FOD) regimes. In this paper, we investigated the effect of filters on shaping PQSs in normal FOD based on a passively mode-locked fiber laser model. A bandpass filter eliminates the time pedestal of dissipative PQSs, thus realizing a multi-pulsing state. When the filter bandwidth is appropriate, the effective spectral filtering effect can lower the pulse splitting threshold and enable the coherent restoration from chaotic PQSs to PQS molecules. Additionally, changing the central wavelength of the filter can generate PQSs and PQS molecules with asymmetric intensity distributions. These results are important guides for the manipulation of PQSs and the construction of high repetition-frequency fiber lasers.

关键词: pure-quartic soliton, soliton molecule, spectral filtering effect, mode-locked fiber laser

Abstract: Recent theoretical verification of self-similar and dissipative pure-quartic solitons (PQSs) emphasized the similarity between PQS lasers and conventional fiber lasers, but the unique equilibrium mechanism hinders the formation of PQS molecules in normal fourth-order dispersion (FOD) regimes. In this paper, we investigated the effect of filters on shaping PQSs in normal FOD based on a passively mode-locked fiber laser model. A bandpass filter eliminates the time pedestal of dissipative PQSs, thus realizing a multi-pulsing state. When the filter bandwidth is appropriate, the effective spectral filtering effect can lower the pulse splitting threshold and enable the coherent restoration from chaotic PQSs to PQS molecules. Additionally, changing the central wavelength of the filter can generate PQSs and PQS molecules with asymmetric intensity distributions. These results are important guides for the manipulation of PQSs and the construction of high repetition-frequency fiber lasers.

Key words: pure-quartic soliton, soliton molecule, spectral filtering effect, mode-locked fiber laser

中图分类号:  (Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics)

  • 42.65.Sf
42.65.Tg (Optical solitons; nonlinear guided waves) 42.55.Wd (Fiber lasers) 42.60.Fc (Modulation, tuning, and mode locking)