WAVEGUIDE-TYPE LASER DEVICE

摘要

A waveguide-type laser device is obtained, provided with a wavelength selection element (14) for selectively reflecting, from among the fundamental wave oscillation wavelengths of a laser light passing through a wavelength conversion element (13), laser lights of wavelength λ = λ0, λ1, λ2,..., λn (n ≥ 2) having different laser oscillation modes, and a wavelength conversion element (13) for converting into harmonics the laser lights of wavelength λ = λ0, λ1, λ2,..., λn (n ≥ 2) having different laser oscillation modes reflected by the wavelength selection element (14). When a material with a broad gain band is used as a laser medium (121) of a solid-state laser element (12), wavelength conversion can be performed highly efficiently at a plurality of wavelengths within the gain band.