Laser device

Abstract

Provided is a laser device capable of realizing the increased output and increased repeatability even when the surface roughness of the gain medium is large. The laser device includes: an excitation light source; a condensing optical system that condenses excitation light outputted from the excitation light source; a gain medium that receives the excitation light condensed by the condensing optical system and outputs emission light; a transparent member that has a smaller surface roughness than the gain medium and transmits the emission light outputted from the gain medium; a supersaturated absorber having a transmittance that increases as the emission light transmitted through the transparent member is absorbed; and a resonator that causes the emission light to resonate between the gain medium and the supersaturated absorber with the transparent member being interposed therebetween, wherein a dielectric multilayer film that reflects the excitation light and transmits the emission light is coated on the surface of the transparent member on the gain medium side.

Dependencies are inferred from the claim text.