摘要
开展了1915 nm高功率、高效率、窄谱宽输出的掺铥光纤激光器(TDFL)研究。基于全光纤主振荡功率放大(MOPA)结构,采用40 W的793 nm半导体激光器泵浦纤芯直径25μm的双包层大模场面积(LMA)掺铥光纤,获得了最高功率12.1 W的1 915 nm窄谱宽连续种子激光输出。将8 W种子光注入掺铥光纤放大器,在793 nm激光泵浦功率为142.9 W时,获得了平均功率90 W的激光输出,其中心波长为1 915.051 nm,3 d B谱宽仅为94 pm,斜率效率为60.2%,光-光转换效率达63.0%。该系统在40 min运行考核时间内输出激光稳定性良好。
A high-power high-efficiency narrow-bandwidth thulium-doped fiber laser（TDFL） with output wavelength 1 915 nm was studied in this work. The thulium-doped fiber laser was based on system of master oscillator power amplifier（MOPA）. The laser diode with about 40 W output power and 793 nm wavelength was used to pump double cladding large-mode-area（LMA） thulium-doped fiber with 25 μm core diameter, the narrow-bandwidth continuous wave（CW） seed laser with wavelength 1 915 nm and maximum power 12.1 W was obtained. When the 793 nm pump power was 142.9 W, after the 8 Wseed laser going through the thulium-doped fiber amplifier, the output laser had average power of 90 W,central wavelength of 1 915.051 nm, and the 3 d B spectrum bandwidth was 94 pm, with slope efficiency of 60%, and optical-to-optical conversion efficiency of 63%. The stability of output laser of this system behaves well in the 40 min operation checking time.
作者
张伟
吴闻迪
余婷
孟佳
杨中国
陈晓龙
刘超铭
叶锡生
Zhang Wei;Wu Wendi;Yu Ting;Meng Jia;Yang Zhongguo;Chen Xiaolong;Liu Chaoming;Ye Xisheng(Research Center of Space Laser Information Technology, Shanghai Institute of Optics and Fine Mechanics,C h i n e s e Academy of Sciences, S h a n g h a i 2 0 1 8 0 0 , China;University o f C h i n e s e Academy of Sciences,Beijing 100049,China;College of S c i e n c e,S h a n g h a i University,S h a n g h a i 200444, China;National Key Laboratory of Materials Behavior and Evaluation Technology in Space Environment,H a r b i n Institute o f T e c h n o l o g y,H a r b i n 1 5 0 0 0 1, China)
出处
《红外与激光工程》
EI
CSCD
北大核心
2018年第5期64-70,共7页
Infrared and Laser Engineering
基金
中国科学院"百人计划"项目(1505521XR0)
