#Y2023 #Laser A disk laser or active mirror is a type of diode pumped solid-state laser characterized by a heat sink and laser output that are realized on opposite sides of a thin layer of active gain medium. Despite their name, disk lasers do not have to be circular; other shapes have also been tried. The thickness of the disk is considerably smaller than the laser beam diameter. Initially, this laser cavity configuration had been proposed and realized experimentally for thin slice semiconductor lasers. The disk laser concepts allow very high average and peak powers due to its large area, leading to moderate power densities on the active material. [WHAT IS A THIN DISK LASER, AND WHAT ADVANTAGES DO THEY OFFER?](https://www.rpmclasers.com/blog/what-is-a-thin-disk-laser-and-what-advantages-do-they-offer/) [结晶终将化碟片——高功率超短脉冲碟片激光器的“蜕变”](https://mp.weixin.qq.com/s/ivWyBfR0BG_ZLjvbT8n5GQ)