光学学报, 2019, 39 (4): 0414001, 网络出版: 2019-05-10
重复频率HF激光脉冲能量稳定性的理论分析 下载: 810次
Theoretical Analysis of Energy Stability of Repetitively Pulsed HF Laser
激光器 中红外激光 重复频率脉冲HF激光器 动力学分析 封闭循环 lasers mid-infrared laser repetitively pulsed HF laser dynamical analysis close cycle
摘要
研究了重复频率HF脉冲激光器的气体介质对激光输出能量稳定性的影响规律。计算结果表明,激光器放电区内SF6的解离率约为1.5%(略高于实验测量值),工作气体介质的消耗速率为2.2×10
15 (cm
-3·s
-1),但消耗量比气体的初始量小3~4个量级。通过合理控制激光器内HF的分子浓度,并适时补充激光器气体介质,可以提高激光器输出能量的稳定性。激光器输出能量变化分为过渡阶段和维持阶段,其中过渡阶段决定了重复频率工作模式下HF激光器的总体出光能力。计算结果可为重复频率非链式HF脉冲激光器设计提供技术支持。
Abstract
The effect of working gas on the output energy stability of a repetitively pulsed HF laser is investigated. The calculated results show that the decomposition of SF6 in the discharge region of the laser is about 1.5%, a little larger than the experimental data. The gas consumption rate is about 2.2×10
15 (cm
-3·s
-1), and the consumption is 3~4 orders of magnitude smaller than the initial content. The stability of the laser output energy can be improved by properly controlling the HF molecular concentration in the laser chamber and replenishing the working gas at a right time. The change of the laser output energy can be divided into two stages, a transitional stage and a maintenance stage. The transitional stage plays a decisive role in the determination of the output power level of a repetitively pulsed HF laser. The calculated results can provide a technical support for the design of a repetitively pulsed non-chain HF laser.
朱峰, 黄珂, 陶蒙蒙, 黄超, 马连英. 重复频率HF激光脉冲能量稳定性的理论分析[J]. 光学学报, 2019, 39(4): 0414001. Feng Zhu, Ke Huang, Mengmeng Tao, Chao Huang, Lianying Ma. Theoretical Analysis of Energy Stability of Repetitively Pulsed HF Laser[J]. Acta Optica Sinica, 2019, 39(4): 0414001.