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.
作者
Xiao-Fa Wang
Dong-Xin Liu
Hui-Hui Han
Hong-Yang Mao
王小发;刘东鑫;韩慧慧;毛红炀(Key Laboratory of Optical Fiber Communication Technology,Chongqing Education Commission,School of Optoelectronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)
基金
the National Natural Science Foundation of China(Grant No.6170031626)
the Natural Science Foundation of Chongqing City,China(Grant Nos.cstc2018jcyjAX0585 and cstc2017zdzxX0011).
