Experimental Demonstration of Laser Induced Thermal Distortions of Phase-Change Cooled Mirrors

Thermal distortions of phase change cooled mirrors with different materials and structures are demonstrated subjecting to radiations of high power laser.The experimental results show that the properties of phase change cooled Si mirrors are obviously better than those of phase change cooled Cu mirrors in reducing thermal distortions, and the thermal distortions of the hole array structures are similar to the round gap structures.