【摘要】 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。更多还原

【Abstract】 According to the reaction mechanism in non-chain pulsed DF lasers,a dynamical model for this kind of laser is presented by using rate equations theory.The optimum gas ratio and reflectance of output mirror are obtained by numerical calculation with this model using the Runge-Kutta method.The experiment is done based on UVpreionized discharge method.The main output parameters of non-chain pulsed DF laser gained from experiment agree well with the theoretical calculation.The theoretical analysis and experimental results both show that the output performance of non-chain pulsed DF laser can be improved by optimizing the parameters of working gas pressure ratio and the reflectance of output mirror.The laser has the best output performance when the working gas ratio is 10:1and the reflectance of output mirror is 30%.The single pulse energy of 4.95 J,pulse duration of 148.8 ns and peak power of 33.27 MW are achieved under above conditions.更多还原