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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速率和减小能级寿命 ,从而提高了谐振腔内的激光饱和光强 .
The laser kinetics mechanism of CO2, N2 and He mixed gas content in sealed-off type CO2 laser is discussed in detail.The main mechanism that gas optimization can increase laser output power is to increase N2 content properly and make N2 excited state and The collision frequency of CO2 laser increases, which increases the number density of laser energy level particles and the relative population number.At the same time, reducing the content of CO2, reducing the collision frequency and increasing the discharge current of the total electron momentum transport The relaxation rate of the upper rotational energy level of the laser and the decrease of the energy level lifetime increase the laser light intensity in the cavity.