脉冲TEA CO2激光器温度特性的理论分析

Theoretical analysis of temperature characteristics of pulsed TEA CO2 laser

摘要: 利用六温度模型速率方程计算了当激光工作气体温度从-30℃～+60℃变化时TEA CO2激光器输出脉冲能量的变化规律。结果表明,激光器输出脉冲能量随着工作温度的升高而近似线性下降;线性下降的快慢和激光工作气体组成、气压、输出耦合镜反射率、注入能量、工作气体组成等均有关系;工作气体气压越高、输出耦合镜反射率越大或注入能量越高,激光输出脉冲能量随温度升高而下降的速度越快。

Abstract: The output energy of a pulsed TEA CO2 laser versus the ambient temperature -30℃～+60℃ was calculated out by six-temperature mode rate equations.Numerical result shows that the output pulse energy almost decreases linearly with the ambient temperature.The gradient of the pulse energy to ambient temperature varies with the composition of the laser mixtures,pressure,mirror reflectance or input energy.With higher mixture pressure,mirror reflectance,or input energy,the output pulse energy decreases more quickly with the ambient temperature.