Single-frequency linearly polarized Q-switched fiber laser based on Nb_(2)GeTe_(4)saturable absorber  

作　　者：陈思雨 邓海芹 张万儒 戴永平 王涛 俞强 李灿 姜曼 粟荣涛 吴坚 周朴 Si-Yu Chen;Hai-Qin Deng;Wan-Ru Zhang;Yong-Ping Dai;Tao Wang;Qiang Yu;Can Li;Man Jiang;Rong-Tao Su;Jian Wu;Pu Zhou(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China;Nanhu Laser Laboratory,National University of Defense Technology,Changsha 410073,China;CAS Key Laboratory of Nanophotonic Materials and Devices&Key Laboratory of Nanodevices and Applications,i-Lab,Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO),Chinese Academy of Sciences(CAS),Suzhou 215123,China)

机构地区：[1]College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China [2]Nanhu Laser Laboratory,National University of Defense Technology,Changsha 410073,China [3]CAS Key Laboratory of Nanophotonic Materials and Devices&Key Laboratory of Nanodevices and Applications,i-Lab,Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO),Chinese Academy of Sciences(CAS),Suzhou 215123,China

出　　处：《Chinese Physics B》2023年第7期382-386,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.62275272);the Training Program for Excellent Young Innovators of Changsha,China(Grant No.KQ2206003).

摘　　要：We report a single-frequency linearly polarized Q-switched fiber laser based on an Nb_(2)GeTe_(4)saturable absorber(SA).The Nb_(2)GeTe_(4)SA triggers passive Q-switching of the laser,and an un-pumped Yb-doped fiber together with a 0.08-nmbandwidth polarization-maintaining fiber Bragg grating(FBG)acts as an ultra-narrow bandwidth filter to realize singlelongitudinal-mode(SLM)oscillation.The devices used in the laser are all kept polarized,so as to ensure linearly polarized laser output.Stable SLM linearly polarized Q-switching operation at 1064.6 nm is successfully achieved,producing a laser with a shortest pulse width of 1.36μs,a linewidth of 28.4 MHz,a repetition rate of 28.3 kHz-95.9 kHz,and a polarization extinction ratio of about 30 dB.It is believed that the single-frequency linearly polarized pulsed fiber laser studied in this paper has great application value in gravitational wave detection,beam combining,nonlinear frequency conversion,and other fields.

关 键 词：fiber laser saturable absorber SINGLE-LONGITUDINAL-MODE pulsed laser 

分 类 号：TN248[电子电信—物理电子学]