摘要
报道了一台高重复频率高效率2μm激光器.理论计算了1.064μm激光抽运Ⅱ类相位匹配KTP晶体的角度调谐曲线,得出KTP晶体按φ=0°,θ=54°切割可获得近简并波长的2μm激光输出.使用1.064μm Nd∶YAG模块作为抽运源,抽运内腔式双晶体走离补偿双谐振光参量振荡器(DROPO),在7 kHz声光调Q频率下,获得23.6 W的2.12μm激光输出,808 nm激光二极管(LD)出光获得2μm激光的斜率效率超过19%.
A high-repetition-rate high-efficiency 2 μm laser was demonstrated. The tuning curve of the type Ⅱ phase matching KTP crystal pumped by 1. 064 μm laser was calculated and it shows that when cut at φ = 0°, θ = 54°, a KTP optical parametric oscillator （OPO） gets output at near degenerated wavelength at 2 μm. The pump source was 1. 064 μm Nd：YAG module. Walk-off compensation was realized by two short crystals in intracavity doubly resonant optical parametric oscillator （DROPO） and the average power of 23.6 W at 2.12 μm is obtained. The pulse repetition frequency of acoustic-optic Qswitch was 7 kHz and the slope efficiency of 808 nm laser diode （LD） to 2 μm laser was higher than 19%.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2007年第11期1488-1491,共4页
Chinese Journal of Lasers
基金
国家863计划资助项目
