非链式脉冲DF激光器放电生成物处理技术

Treating technology of discharge products in no-chain pulsed DF laser

非链式脉冲DF激光器放电产生的基态DF分子对激发态DF分子的消激发作用是影响激光器稳定工作的重要原因。为解决这一问题,分别采用3A和5A分子筛作为吸附剂进行实验研究。无分子筛时,激光器重频运转1 000个脉冲后,输出功率下降到初始功率的56%。分别使用3A、5A分子筛后,激光器重频运转脉冲个数达到5 000和6 800时,输出功率下降幅度仍然不超过20%,大大提高了激光器的稳定工作时间。实验结果表明,5A分子筛的吸附效率大于3A分子筛,且两种分子筛不仅对基态DF分子产生吸附,还对工作气体产生吸附,可通过及时补充工作气体提高激光器的稳定性。

The de-excitation effect of ground state DF molecules after dicharge of no-chain pulsed DF laser to excited DF molecules is an important cause for laser＇s steady working. In order to solve this problem,molecular sieves of 3A and 5A were respectively used as the adsorbent for experiments. Without molecular sieve,thelaser output power decreased to 56% of initial power after 1 000 repetitive pulses. After 3A and 5A molecular sieve being utilized,the decrease of laser power were less than 20% after 5 000 and 6 800 shots respectively,so the stability of the laser has been greatly improved. The results show that the adsorptive efficiency of 5A molecular sieve is higher than that of 3A molecular sieve. And these two molecular sieves adsorbed not only the ground DF molecules,but also reacting gas. So the stability of laser can be improved by supplementing of reacting gas timely.