摘要
以976 nm光纤输出半导体激光器为抽运源,采用掺镱双包层光纤,对单块非平面环形腔激光器(NPRO)产生的1 064 nm连续单频信号光进行放大.当入纤抽运光功率49.6 W,信号光功率200 mW时,由10 m长的增益光纤获得了最高功率16.1 W的连续单频激光输出.采用不同长度的增益光纤进行对比实验,分析了在一定的抽运光功率和信号光功率条件下,光纤长度对放大输出功率的影响.研究了放大器的输出光谱特性,分析了信号光对光纤中放大自发辐射的抑制情况.用F-P频谱分析仪对放大前后的频谱进行测量,证实放大器实现了单频放大.
Yb-doped double-clad fiber amplifiers of different lengths were pumped by a fiber-coupled diode laser emitting at 976 nm. A non-planar ring oscillator was used as the signal source emitting CW single frequency radiation at 1 064 nm. When the pumping power was 49.6 W and the signal power was 200 mW, up to 16.1 W single-frequency laser was obtained in a 10 m-long fiber. The relation between fiber length and output power was analyzed by changing different lengths of fiber as the gain media. The emission spectrum was discussed. Single frequency operation was verified by a Fabry-Perot interferometer.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2007年第6期532-535,共4页
Transactions of Beijing Institute of Technology
基金
国家部委预研项目(41302010107)
关键词
光纤放大器
单频
连续
掺镱双包层光纤
fiber amplifier
single frequency
continuous wave
Yb^3 ＋ doped double-clad fiber
