Patent ID: 9214784
Filing Date: 2015-12-15
Classification: G02F,H01S

Abstract:
1. A laser device including: a pump laser that emits pumping light, a solid-state laser element that absorbs the pumping light emitted from said pump laser to generate laser light, and an optical element upon which the laser light generated by said solid-state laser element is incident, wherein an end surface of said solid-state laser element is sloped in such a way that, when said laser light is incident upon air from the end surface of said solid-state laser element, an angle of incidence which a normal to an end face on a side of said solid-state laser element in a plane of the incidence forms with a traveling direction of said laser light substantially matches a Brewster angle at the incidence plane, an end surface of said optical element is sloped in such a way that, when said laser light is incident upon air from the end surface of said optical element, an angle of incidence which a normal to an end face on a side of said optical element in a plane of the incidence forms with a traveling direction of said laser light substantially matches a Brewster angle at the incidence plane, and the end surface of said solid-state laser element and the end surface of said optical element are arranged in such a way as to be opposite to each other, and wherein in at least one of the solid-state laser element and the optical element, a clad layer is formed on at least one of surfaces parallel to an optical axis in said solid-state laser element and an optical axis in said optical element and perpendicular to a plane including said optical axes and an angle of emergence so that said laser device has a structure of waveguide type, and wherein a refractive index of the clad layer is smaller than that of the solid-state laser element.