摘要
导出了工作于ＴＭ０１０模的圆柱形微波等离子体腔中等离子体与腔谐振频率关系的精确解析式和微扰近似公式，比较结果表明：在微波激励低气压气体激光器中微扰理论可相当精确地分析微波等离子体对腔的扰动效应。给出了消除等离子体与管壳的扰动引起的腔失谐的方法，从而在气体激光器中成功地形成了稳定与均匀的微波等离子体和稳定的激光输出。
An analytical expression and a perturbation formula for the cavity resonant frequency dependence upon plasma are derived for the cylindrical TM 010 microwave plasma cavity. A comparison between the exact and the approximate solutions showed that the perturbation theory can be used accurately to analyze the perturbating effect on the cavity resonant frequency caused by microwave plasma in low pressure microwave excited gas lasers. A new method is proposed to prevent the detuning of the cavity from the perturbation of the plasma and the glass tube, so that a uniform and steady state microwave plasma is successfully formed and the stable laser output is also obtained. The electron density and microwave dielectric constant of the tube material can be measured by the perturbation approach.
出处
《中国激光》
EI
CAS
CSCD
北大核心
1997年第3期209-214,共6页
Chinese Journal of Lasers
基金
国家自然科学基金
关键词
气体激光器
微波激励谐振腔
微扰理论
gas laser, microwave excited resonant cavity, perturbation theory
