Over 100 mW linearly polarized single-frequency fiber laser based on Er:YAG crystal-derived silica fiber  

作　　者：Xinyue Li Jianxiang Wen Yanhua Luo Wei Chen Fufei Pang Gang-Ding Peng Tingyun Wang 李鑫越;文建湘;罗艳华;陈伟;庞拂飞;彭纲定;王廷云(Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication,School of Communication and Information Engineering,Shanghai University,Shanghai 200444,China;Photonics&Optical Communications,School of Electrical Engineering&Telecommunications,University of New South Wales,Sydney,NSW 2052,Australia)

机构地区：[1]Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication,School of Communication and Information Engineering,Shanghai University,Shanghai 200444,China [2]Photonics&Optical Communications,School of Electrical Engineering&Telecommunications,University of New South Wales,Sydney,NSW 2052,Australia

出　　处：《Chinese Optics Letters》2024年第11期73-79,共7页中国光学快报(英文版)

基　　金：supported by the National Key Research and Development Program of China (No.2020YFB1805800);the National Natural Science Foundation of China (Nos.61975113,61935002,and 62275148);the 111 Project (No.D20031);the Shanghai Professional Technical Public Service Platform of Advanced Optical Waveguide Intelligent Manufacturing and Testing (No.19DZ229)。

摘　　要：The realization of single-frequency fiber lasers requires high-gain media. In this work, an Er:YAG crystal-derived silica fiber(EYDSF) was prepared using the melt-in-tube method, whose gain coefficient was up to 2.11 dB/cm using a pump power of 1480 nm. A linearly polarized single-frequency fiber laser was constructed based on a 2-cm-long EYDSF. The optical-to-optical conversion efficiency was 27.0%. A fiber mirror was used at the end of the cavity to reflect the residual pump, which can be absorbed by the EYDSF to further increase the output power. The maximum output power and the slope efficiency of the proposed laser were over 100 mW and up to 22.4%, respectively. To the best of our knowledge, it has the highest output power and the largest slope efficiency, compared with the previous single-frequency fiber lasers based on EYDSFs. In addition, the laser had good polarization and noise performance with a polarization extinction ratio of 25 dB and a relative intensity noise of <-139 dB/Hz. The performance of the proposed fiber laser demonstrates its great potential as a seed source for coherent optical communications, laser combining systems, and other fields.

关 键 词：linear polarization single-frequency fiber laser Er:YAG crystal-derived silica fiber. 

分 类 号：TN2[电子电信—物理电子学]