激光二极管连续抽运电光调Q Nd:YVO4激光器

报道了全固态激光器连续抽运高重复率电光调Q的实验和理论分析结果。用LGS（La3Ga5SiO14）晶体作电光调Q元件，在激光二极管（LD）端面抽运Nd：YVO4激光器中实现了较高重复率的电光调Q输出。实验中在10^4Hz重复率下，抽运功率为28w时，平均功率超过5W，脉冲宽度为7ns，峰值功率为70kW，并对不同重复率时的脉冲输出进行了比较，在低重复率下，脉宽〈6．5ns，峰值功率超过100kW。在理论上，通过对连续抽运时的电光调Q速率方程进行修正，并考虑放大自发辐射（ASE）的影响，对调Q激光器的储能过程和脉冲输出特性进行了模拟，所得结果和实验数据能够很好地吻合。最后，利用LasCad软件对晶体的热效应进行了模拟，并利用临界稳定腔方法对热焦距进行了测量，测量和模拟结果基本一致。

Laser Diode Continuous-Wave-Pumped Repetitive Electro-Optic Q-Switched Nd: YVO4 Laser

A laser diode (LD) continuous-wave (CW) end-pumped high repetition rate electro-optic (EO) Q-switched Nd:YVO4 laser was experimentally and theoretically studied. In experiments, using LGS(La3Ga5SiO14) single crystal as an EO Q-switch, with 28 W pump power, an output pulse train with 70 kW peak power, about 7 ns pulse duration and more than 5 W average power was obtained at 104 Hz repetition rate. And the Q-switched output performance at different repetition rate was compared. In theory, by solving the amendatory actively Q-switched rate equations, taking amplified spontaneous emission (ASE) into account, a series of results consistent with experiments were achieved. In the last, the thermal lens effect of end-pumped solid state laser was simulated by LasCad software and measured through experiments, the calculation results were almost identical to the experimental values.