Patent ID: 8743917
Filing Date: 2014-06-03
Classification: H01S

Abstract:
1. A wavelength conversion laser light source, comprising: a solid-state laser medium configured to generate fundamental light; a wavelength conversion element configured to convert the fundamental light into second harmonic light which has a higher frequency than the fundamental light; a conductive material in contact with the wavelength conversion element; and a sealing member configured to seal a bonding portion between the solid-state laser medium and the wavelength conversion element, wherein the wavelength conversion element includes a polarization inverted structure formed with a polarization inversion region, and at least one first lateral surface which perpendicularly intersects with the polarization inversion region, wherein the conductive material is in contact with the at least one first lateral surface, wherein the solid-state laser medium includes a first principal plane which is at least partially subjected to mirror polishing, wherein the wavelength conversion element includes a second principal plane which is at least partially subjected to mirror polishing, wherein the bonding portion includes an optical contact surface in which the first and second principal planes are in optical contact by means of hydrogen bonding, wherein the optical contact surface allows transmission of the laser beam, wherein a concavity or a notch which is adjacent to a periphery of the optical contact surface is formed on at least one of the solid-state laser medium and the wavelength conversion element, and wherein the sealing member disposed in the concavity or the notch covers the periphery of the optical contact surface.