Mid‐infrared all‐fiber gain‐switched pulsed laser at 3μm  

作　　者：Xiaojin Zhang Weiwei Li Jin Li Huiying Xu Zhiping Cai Zhengqian Luo 

机构地区：[1]Department of Electronic Engineering,Xiamen University,Xiamen 361005,China

出　　处：《Opto-Electronic Advances》2020年第5期1-10,共10页光电进展（英文）

基　　金：National Natural Science Foundation of China(Nos.61475129,11674269);Fundamental Research Funds for the Central Universities(No.20720180057);Natural Science Foundation of Fujian Province for Distinguished Young Scientists(No.2017J06016)。

摘　　要：Mid-infrared(MIR)fiber pulsed lasers are of tremendous application interest in eye-safe LIDAR,spectroscopy,chemical detection and medicine.So far,these MIR lasers largely required bulk optical elements,complex free-space light alignment and large footprint,precluding compact all-fiber structure.Here,we proposed and demonstrated an all-fiberized structured gain-switched Ho3+-doped ZBLAN fiber laser operating around 2.9μm.A home-made 1146 nm Raman fiber pulsed laser was utilized to pump highly concentrated single-cladding Ho3+-doped ZBLAN fiber with different lengths of 2 m or 0.25 m.A home-made MIR fiber mirror and a perpendicular-polished ZBLAN fiber end construct the all-fiberized MIR cavity.Stable gain-switched multiple states with a sub-pulse number tuned from 1 to 8 were observed.The effects of gain fiber length,pump power,pump repetition rate and output coupling ratio on performance of gain-switched pulses were further investigated in detail.The shortest pulse duration of 283 ns was attained with 10 kHz repetition rate.The pulsed laser,centered at 2.92μm,had a maximum average output power of 54.2 mW and a slope efficiency of 10.12%.It is,to the best of our knowledge,the first time to demonstrate a mid-infrared gain-switched Ho3+:ZBLAN fiber laser with compact all-fiber structure.

关 键 词：fiber laser MID-INFRARED GAIN-SWITCHING 

分 类 号：TN248[电子电信—物理电子学]