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. Initially, this laser cavity co. Active mirrors and disk lasersInitially, disk lasers were called active mirrors, because the of a disk laser is essentially an optical with greater than unity. An active mirror is a thin disk-shaped double-pass. The power of such lasers is limited not only by the power of pump available, but also by overheating, (ASE) and the background. To avoid overheating, the size should be i. In order to reduce the impact of ASE, an anti-ASE cap consisting of undoped material on the surface of a disk laser has been suggested. Such a cap allows spontaneously emitted photons to escape from the ac.
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