片状激光是固体激光的一种形式，因激光媒介为片状得名 。激光束由厚约80至200微米的盘片制得。 这种激光的优点是，激光晶体能够被更好的冷却，以及更好的光束质量和更高的单位体积功率。 片状激光通过激光二极管被激发，具有很高的工作效率（70%）。 片状激光由斯图加特大学的Adolf Giesen研发而成。

A disk laser or active mirror (Fig.1) 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.