Experimental study on the evolution of bright-dark pulses in a 2μm mode-locked thulium/holmium co-doped fiber laser  

作　　者：WANG Xiaofa WANG Jie ZHAO Kunyang 

机构地区：[1]Chongqing Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology,School of Optoelectronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China

出　　处：《Optoelectronics Letters》2024年第12期714-720,共7页光电子快报（英文版）

基　　金：supported by the Natural Science Foundation of Chongqing City,China(No.cstc2018jcyjAX0585)。

摘　　要：We experimentally demonstrate the effects of pump power and polarization state on the evolution of bright-dark pulses(BDPs)in a figure-eight passively mode-locked thulium/holmium co-doped fiber laser(THDFL)using nonlinear amplifying loop mirror(NALM)technology.As the pump power increases from 0.5 W to 1 W,the BDPs are separated and exhibit a linear increase in the time interval between the bright pulse(BP)and dark pulse(DP),which roughly corresponds to the reciprocal of the modulation frequency in the radio frequency(RF)spectrum.Additionally,the polarization state in the cavity is altered by adjusting the polarization controller(PC),and the central wavelength of spectrum,pulse waveform,and full width at half maximum(FWHM)of BDPs in different states are presented.

关 键 词：polarization fiber pump 

分 类 号：TN248[电子电信—物理电子学]