优化封离型CO2激光工作气体的动力学机理研究

详细讨论了封离型CO₂激光器中CO₂，N₂和He三混合气 体含量被优化组合后的激光动力 学机理. 气体优化可以提高激光输出功率的主要机理是通过适当增加N₂含量， 使N₂激发 态与CO₂激光上能级的碰撞频率增加，提高了激光能级粒子数密度和相对布居数 . 同时， 适当减少CO₂含量，使总的电子动量输运碰撞频率减小、放电电流增大，导致增 加激光上转动能级的弛豫 关键词： 2激光')" href="#">CO₂激光 气体动力学 强化机理

Study on mechanisms for enhancement kinetics of lasing gases in an optimized sea led-off CO2 laser

The kinetics of gases (CO₂, N₂ and He) in an optimized se aled-off CO₂ laser are discussed in details. A comparison of numerical results shows that the po pulation of the laser levels is increased by optimizing the lasing gases, with t he increase of an excited N₂ impacting to the upper laser level. Also , decreas ing the electron momentum transition frequency and increasing discharge current result in the increase of the relaxation of the upper rotational laser levels an d the decrease of the level lifetime, thus the lasing saturation intensity in a resonator is increased finally.