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依据非链式脉冲氟化氘(DF)激光器的反应机理,采用速率方程理论,建立了非链式脉冲DF激光器动力学模型。采用Runge-Kutta法对该模型进行数值计算,得到了最佳气体比例和最佳输出镜反射率参数。采用紫外预电离放电引发方式,对非链式脉冲DF激光器进行了实验研究,得到了激光器输出的主要技术参数,实验结果与理论计算结果相吻合。理论分析和实验结果均表明,可以通过优化工作气体比例和输出镜反射率参数来改善激光器的输出性能。在工作气体分压比为10:1、输出镜反射率为30%时,激光器输出性能最佳,此时实验得到的单脉冲激光能量为4.95J,脉冲宽度为148.8ns,峰值功率为33.27MW。
Based on the reaction mechanism of unchained pulsed deuterium fluoride (DF) lasers, the kinetic model of DF laser was established using the rate equation theory. Runge-Kutta method was used to calculate the model. The optimal gas ratio and the optimal output mirror reflectivity were obtained. Using UV preionization discharge triggering method, the experiment of unchained pulsed DF laser was carried out. The main technical parameters of the laser output were obtained. The experimental results are in good agreement with the theoretical calculation results. Both theoretical analysis and experimental results show that the laser output performance can be improved by optimizing the working gas ratio and output mirror reflectivity parameters. When the working gas partial pressure ratio is 10: 1 and the reflectivity of the output mirror is 30%, the laser output performance is the best. At this time, the experimental single-pulse laser energy is 4.95J, the pulse width is 148.8ns and the peak power is 33.27MW .