研究了气体组份和峰化电容对紫外光预电离脉冲HF激光器性能的影响。实验发现最佳气体混合比为SF6/C2H6=20:1,峰化电容和主放电电容的最佳比为Cp/Cs=0.3在最佳气体混合比时,最大激光脉冲能量和对应的总气压随充电电压的提高而增大。另外,激光脉冲宽度随气压的升高而减小。得到了400 mJ的能量输出,脉冲峰值功率为1.5 MW,激光能量比输出达31.7 J/l·atm,最大电光转换效率约为2.2%。

The influence of the peaking capacitor and the pressure of mixture gas on the performance of UV preionized pulsed HF laser is investigated. There exist an optimum mixing ratio (SF 6/C 2H 6=20∶1) and an optimum capacitor ratio (C p/C s=0.3). In addition, the laser pulse width decreases as the gas pressure increases. Under the optimum mixing ratio the maximum attainable output energy and the optimal pressure increase with increase of the charging voltage. The laser gives laser output energy up to 400 mJ with a maximum electric efficiency about 2.2% and the specific energy 31.7 J/l·atm.