通过对百瓦级铜蒸汽激光器放电管内气体温度的分析计算，给出了百瓦级器件为防止“黑心”现象输入功率密度的最佳值。分析计算了在此输入功率密度下，为达到最佳工作温度所需的保温层厚度，理论计算和实验结果吻合较好。从而建立了一套确定放电管内气体温度、保温层厚度的方法 Through the analysis and calculation of gas temperature in discharge tube of one hundred watt copper vapor laser, the best value of input power density of one hundred watt device to prevent “black heart” phenomenon is given. The thermal insulation thickness needed to reach the optimal working temperature under the input power density is calculated and calculated. The theoretical calculation and experimental results are in good agreement. Thus a set of methods to determine the gas discharge tube temperature, insulation thickness