Patent ID: 8571076
Filing Date: 2013-10-29
Classification: G02F,H01S

Abstract:
1. A laser light source, comprising: a fundamental laser generator for generating a fundamental laser light; a wavelength conversion element having formed therein a periodically poled structure, for converting the fundamental laser light into a laser light having a different wavelength, said wavelength conversion element being made of a ferroelectric crystal and said wavelength conversion element including an element surface crossing a polarization direction of the periodically poled structure; a conductive holding member for holding at least a portion of said element surface of said wavelength conversion element; and an insulation layer provided between said conductive holding member and said element surface, wherein said conductive holding member has a thermal conductivity of not less than 50 W/(m·K), wherein the insulation layer has an electric resistivity of not less than 1×10 wherein said wavelength conversion element includes a light-exiting side from which the laser light is emitted and a light-incident side on which the fundamental laser light is incident, and wherein said insulation layer is formed in a broader range on said light-exiting side than on said light-incident side, such that said insulation layer (i) covers less than 100% of the portion of said element surface that is held by said conductive holding member and (ii) covers no less than 75% of the portion of said element surface that is held by said conductive holding member.