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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104Hz重复率下,抽运功率为28 W时,平均功率超过5 W,脉冲宽度为7 ns,峰值功率为70 kW,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<6.5 ns,峰值功率超过100 kW.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.
The experimental and theoretical analysis results of the continuous-pumping high repetition rate electro-optical Q-switching of all-solid-state laser are reported.LGS (La3Ga5SiO14) crystal is used as the electro-optic Q-switched element and the Nd: YVO4 laser is pumped at the end face of the laser diode High repetition rate of electro-optic Q output.Experimental at 104Hz repetition rate, the pumping power of 28W, the average power of more than 5W, pulse width of 7 ns, the peak power of 70 kW, and for different repetition rates Pulse output is compared at low repetition rate with pulse width <6.5 ns and peak power over 100 kW. In theory, by modifying the electro-optic Q-rate equation for continuous pumping and considering the effects of amplified spontaneous emission (ASE ), The energy storage process and pulse output characteristics of the Q-switched laser are simulated and the results agree well with the experimental data.Finally, the LasCad software is used to simulate the thermal effect of the crystal and the critical stability cavity method is used Thermal focal length was measured, the measurement and simulation results are basically the same.