Patent ID: 7796672
Filing Date: 2010-09-14
Classification: G02F,H01S,H04N

Abstract:
1. A light source device, comprising: a laser light source defining a light emergence surface, the laser light source emitting a laser beam of a prescribed wavelength, the laser light source including: a nonlinear optical element defining an emergence surface, the nonlinear optical element being disposed facing the light emergence surface of the laser light source, the nonlinear optical element converting an emission wavelength of the laser beam emitted from the laser light source and causing the laser beam to emerge; a volume phase grating defining an interior, the volume phase grating facing the emergence surface of the nonlinear optical element, the volume phase grating including: a Bragg grating structure disposed at the interior that only reflects a portion of the laser beam having a specified wavelength of the emission wavelength and band narrows the laser beam having the emission wavelength, the portion of the laser beam that is reflected by the Bragg grating passes through the light emitting element, is reflected by the mirror, and resonates with the laser beam newly emitted by the light emitting element, and a first dielectric multilayer, provided at a light emergence surface of the volume phase grating, the first dielectric multilayer transmitting the laser beam of the converted wavelength and reflecting light of other wavelengths including the laser beam of the emission wavelength, the emission wavelength including the specified wavelength and other wavelengths except the specified wavelength.