脉冲HF激光器预电离设计及效果评估

发布时间：2018-03-13 23:07

本文选题：预电离　切入点：放电激励　出处：《红外与激光工程》2017年06期 　论文类型：期刊论文

【摘要】：气体介质稳定体放电是放电激励气体激光器高效输出的基础和前提,预电离是实现高压气体介质稳定体放电的有效技术途径之一。基于放电激励脉冲HF激光器电气结构总体设计要求设计了结构紧凑的紫外光自动预电离装置,并对其在气体介质中预电离产生的初始电子数密度进行了数值模拟。模拟结果表明:在整个放电区域内初始电子数密度均在109/cm~3左右,满足介质体放电要求。通过激光器能量输出实验评估了预电离效果,对SF6和H2混合气体介质,在充电电压较低时,输出能量有数倍的提高;对SF6和C2H6混合气体介质,在充电电压20 kV时激光器输出能量由200 mJ提高至297 mJ,提高了近50%。实验结果表明:该预电离装置对改善激光器能量输出特性有明显效果。
[Abstract]:Gas dielectric steady volume discharge is the basis and premise of high efficiency output of gas laser excited by discharge. Preionization is one of the effective techniques to realize the steady bulk discharge of high pressure gas dielectric. A compact UV automatic preionization device is designed based on the general design requirements of the electric structure of the pulsed HF laser excited by discharge. The initial electron number density produced by preionization in gas medium is numerically simulated. The simulation results show that the initial electron number density is about 109 / cm ~ (-3) in the whole discharge region. The effect of preionization was evaluated by laser energy output experiment. The output energy of SF6 and H2 mixed gas medium increased several times when the charging voltage was low, and the energy of SF6 and C _ 2H _ 6 mixed gas medium was improved by several times. The output energy of the laser is increased from 200 MJ to 297 MJ at the charging voltage of 20 kV, which increases the output energy of the laser from 200 MJ to 297 MJ. The experimental results show that the preionization device has obvious effect on improving the energy output characteristics of the laser.
【作者单位】：西北核技术研究所激光与物质相互作用国家重点实验室;
【基金】：激光与物质相互作用国家重点实验室基金(SKLLIM1110)
【分类号】：TN248

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