Patent Number: 8,820,968

Title: Wavelength conversion element, laser light source device, image display device, and method of manufacturing wavelength conversion element

Abstract: A method of manufacturing a wavelength conversion element can control a formation process of a polarization inversion structure with single crystalline magnesium-doped lithium niobate having a congruent composition, and can stably manufacture wavelength conversion elements having high conversion efficiency. The method involves forming periodic electrodes on the +z face of an MgLN substrate and forming an opposite electrode on the -z face of the MgLN substrate; heat-treating the substrate after forming the periodic electrodes and the opposite electrode; and applying a pulsed electric field between the periodic electrodes and the opposite electrode while holding the MgLN substrate at a temperature of 100.degree. C. or higher. The wavelength conversion element has a polarization inversion structure formed by applying an electric field to a heat-treated MgLN substrate.

Inventors: Furuya; Hiroyuki (Kumamoto, JP)

Assignee: Panasonic Corporation

International Classification: G02B 27/20 (20060101)

Expiration Date: 9/02/12018