In high power CO 2 laser the infrared material output-coupler window inevitable absorbing resonant laser energy will produce non-uniform temperature field distribution, and also cause output coupler window to generate thermal distortion, which is called the output-coupler window thermal effect. 高功率CO2激光器输出窗不可避免地要吸收谐振腔的激光能量,在其内部产生非均匀温度场的分布,并引起输出窗发生热形变。