[25p-D215-1~13] 3.5 Laser system and materials

[25p-D215-6] Novel Structures of Conduction Cooling Active-Mirror Amplifier at Low-Temperature

〇Takahiko Kuroiwa^1,2, Shotaro Kitajima³, Shigeki Tokita^1,2, Tsuneto Kanai¹, Jumpei Ogino¹, Junji Kawanaka^1,2 (1.ILE, Osaka Univ., 2.GSE, Osaka Univ., 3.Dept. of Electronics, Nagoya Univ.)

Keywords:high average power laser

In order to achieve the next-generation high-repetition power laser, we investigated novel structures of the heat sink of the conduction-cooled active-mirror amplifier at low temperature. In conduction cooling active-mirror amplifier, the problem is the deformation of the gain medium caused by the difference in the coefficient of thermal expansion between the gain medium and the heat-sink during cooling. In this presentation, heat-sinks are classified by the thermal deformation suppression method, and two novel types of heat-sink structures that reduce thermal deformation are shown for heat-sink structures that use copper as a heat-sink.