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采用LD端面抽运Nd:YVO4激光器,在声光Q开关重复频率为50 k Hz、LD最大泵浦功率50 W时,获得输出功率26.37 W、脉冲宽度26.28 ns的1 064 nm激光输出。通过该系统抽运键合KTP外腔式光参量振荡器(OPO),当LD泵浦电流24 A、对应1 064 nm泵浦功率7.36 W时,实现了重频50 k Hz的2.174μm脉冲激光输出,激光平均输出功率为324 m W,激光脉宽为17.8 ns。同时,通过实验分析了不同输出镜透过率和声光调Q激光重频对1.064μm和2.1μm激光输出功率、脉宽的影响。最后通过理论值与实验测量值的对比得出,两组数据基本吻合,且2.1μm输出功率未出现饱和。
The LD end - pumped Nd: YVO4 laser was used to obtain a laser output of 1 064 nm with an output power of 26.37 W and a pulse width of 26.28 ns at a repetition frequency of 50 k Hz and a maximum LD power of 50 W. Through this system, the KTP external cavity optical parametric oscillator (OPO) is pumped and pumped. When the LD pump current is 24 A and the pump power is 7.36 W at 1 064 nm, the 2.174μm pulsed laser with 50k Hz repetition rate is realized The average laser output is 324 mW and the laser pulse width is 17.8 ns. At the same time, the effects of different output mirror transmittances and acousto-optic Q-switched laser repetition on the laser output power and pulse width of 1.064μm and 2.1μm were analyzed experimentally. Finally, the theoretical and experimental values obtained by the comparison, the two sets of data are basically consistent, and 2.1μm output power does not appear saturated.