中国物理B ›› 2021, Vol. 30 ›› Issue (5): 54205-054205.doi: 10.1088/1674-1056/abd68f

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Generation of cavity-birefringence-dependent multi-wavelength bright-dark pulse pair in a figure-eight thulium-doped fiber laser

Xiao-Fa Wang(王小发), Dong-Xin Liu(刘东鑫), Hui-Hui Han(韩慧慧), and Hong-Yang Mao(毛红炀)   

  1. Key Laboratory of Optical Fiber Communication Technology, Chongqing Education Commission, School of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
  • 收稿日期:2020-10-27 修回日期:2020-12-03 接受日期:2020-12-24 出版日期:2021-05-14 发布日期:2021-05-14
  • 通讯作者: Xiao-Fa Wang E-mail:wangxf@cqupt.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 6170031626) and the Natural Science Foundation of Chongqing City, China (Grant Nos. cstc2018jcyjAX0585 and cstc2017zdzxX0011).

Generation of cavity-birefringence-dependent multi-wavelength bright-dark pulse pair in a figure-eight thulium-doped fiber laser

Xiao-Fa Wang(王小发), Dong-Xin Liu(刘东鑫), Hui-Hui Han(韩慧慧), and Hong-Yang Mao(毛红炀)   

  1. Key Laboratory of Optical Fiber Communication Technology, Chongqing Education Commission, School of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
  • Received:2020-10-27 Revised:2020-12-03 Accepted:2020-12-24 Online:2021-05-14 Published:2021-05-14
  • Contact: Xiao-Fa Wang E-mail:wangxf@cqupt.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 6170031626) and the Natural Science Foundation of Chongqing City, China (Grant Nos. cstc2018jcyjAX0585 and cstc2017zdzxX0011).

摘要: We experimentally demonstrated a stable multi-wavelength bright-dark pulse pair in a mode-locked thulium-doped fiber laser (TDFL). The nonlinear polarization rotation (NPR) and nonlinear optical loop mirror (NOLM) were employed in a figure-eight cavity to allow for multi-wavelength mode-locking operation. By incorporating different lengths of high birefringence polarization-maintaining fiber (PMF), the fiber laser could operate stably in a multi-wavelength emission state. Compared with the absence of the PMF, the birefringence effect caused by PMF resulted in rich multi-wavelength optical spectra and better intensity symmetry and stability of the bright-dark pulse pair.

关键词: bright-dark pulse pair, nonlinear polarization rotation, fiber laser, polarization-maintaining fiber

Abstract: We experimentally demonstrated a stable multi-wavelength bright-dark pulse pair in a mode-locked thulium-doped fiber laser (TDFL). The nonlinear polarization rotation (NPR) and nonlinear optical loop mirror (NOLM) were employed in a figure-eight cavity to allow for multi-wavelength mode-locking operation. By incorporating different lengths of high birefringence polarization-maintaining fiber (PMF), the fiber laser could operate stably in a multi-wavelength emission state. Compared with the absence of the PMF, the birefringence effect caused by PMF resulted in rich multi-wavelength optical spectra and better intensity symmetry and stability of the bright-dark pulse pair.

Key words: bright-dark pulse pair, nonlinear polarization rotation, fiber laser, polarization-maintaining fiber

中图分类号:  (Fiber lasers)

  • 42.55.Wd
42.60.Fc (Modulation, tuning, and mode locking) 42.65.Re (Ultrafast processes; optical pulse generation and pulse compression) 42.25.Lc (Birefringence)