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介绍了利用紫外预电离和横向放电结构建立的非链式电激励脉冲HF激光装置,对激光工作介质SF6/C2H6混合气体的放电特性以及不同气体总压和气体分数比条件下的激光能量变化进行了研究,并对激光脉冲信号和近场光斑的空间分布进行了实验测量。实验结果表明:混合气体的放电过程具有辉光放电、电压维持和电弧放电的阶段性特点。为获得最佳的激光输出,混合气体中的C2H6含量应控制在6%～8%之间,并且不同混合气体总压对应着不同的最佳充电电压。在充电电压为28 kV、总气压为12 kPa、C2H6含量为8%时获得最大单脉冲能量为0.6 J,比能量输出达到8.5 J/l,激光器的电光转换效率约为2.5%。
The non-chain electric pulsed HF pulsed HF laser device based on UV pre-ionization and lateral discharge structure was introduced. The discharge characteristics of laser working medium SF6 / C2H6 mixed gas and laser energy changes under different total gas pressure and gas fraction ratio The research, and the laser pulse signal and the near field spot spatial distribution of the experimental measurement. The experimental results show that the discharge process of mixed gas has the characteristics of glow discharge, voltage maintenance and arcing. In order to obtain the best laser output, the content of C2H6 in the mixed gas should be controlled between 6% and 8%, and the total pressure of different mixed gases corresponds to different optimal charging voltages. The maximum single pulse energy is 0.6 J at a charging voltage of 28 kV, total pressure of 12 kPa and C2H6 content of 8%, and the specific energy output reaches 8.5 J / l. The electro-optic conversion efficiency of the laser is about 2.5%.