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Chin. Phys. B, 2021, Vol. 30(11): 114212    DOI: 10.1088/1674-1056/ac0e22

Generation of domain-wall solitons in an anomalous dispersion fiber ring laser

Wen-Yan Zhang(张文艳)1,†, Kun Yang(杨坤)1, Li-Jie Geng(耿利杰)1, Nan-Nan Liu(刘楠楠)1, Yun-Qi Hao(郝蕴琦)1, Tian-Hao Xian(贤天浩)2, and Li Zhan(詹黎)2
1 Henan Key Laboratory of Magnetoelectronic Information Functional Materials, School of Physics and Electronic Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China;
2 State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
Abstract  We report experimental observations performed using a net anomalous dispersion Er-doped fiber ring laser without polarization-selective elements, highlighting the domain-wall solitary pulses generated under the incoherent polarization coupling. By adjusting the pump power and the polarization state appropriately, bright and dark solitons can stably co-exist in the cavity, both centered at 1562.16 nm with a 3-dB spectral width of ~ 0.15 nm and a repetition rate of 3.83 MHz. Moreover, the 0.8 mm long thulium-doped fiber (TDF) facilitated the mode-locking and self-starting of the laser. This is the first demonstration of a laser being used to generate bright and dark solitons synchronously while using TDF as the saturable absorber (SA). Except possessing the all-fiber structure, the laser exhibits good stability, which may have a significant influence on improvement of the pulse-laser design, and may broaden practical applications in optical sensing, optical communication, and soliton multiplexed systems.
Keywords:  optical solitons      fiber lasers      domain wall soliton      pulse laser  
Received:  21 May 2021      Revised:  21 June 2021      Accepted manuscript online:  24 June 2021
PACS:  42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)  
  42.65.Tg (Optical solitons; nonlinear guided waves)  
  11.27.+d (Extended classical solutions; cosmic strings, domain walls, texture)  
  75.60.Ch (Domain walls and domain structure)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11874040, 11904327, and 61905222), Foundation for Leading Talents of Minhang, Shanghai, and the Specialized Research Fund for the Doctoral Program of Zhengzhou University of Light Industry (Grant No. 0170-13501050036).
Corresponding Authors:  Wen-Yan Zhang     E-mail:

Cite this article: 

Wen-Yan Zhang(张文艳), Kun Yang(杨坤), Li-Jie Geng(耿利杰), Nan-Nan Liu(刘楠楠), Yun-Qi Hao(郝蕴琦), Tian-Hao Xian(贤天浩), and Li Zhan(詹黎) Generation of domain-wall solitons in an anomalous dispersion fiber ring laser 2021 Chin. Phys. B 30 114212

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