Patent ID: 7616670
Filing Date: 2009-11-10
Classification: H01S

Abstract:
1. A laser light source apparatus comprising: an excitation light source; a resonator including the excitation light source and a pair of resonator mirrors; wherein one of two higher harmonic waves generated from a wavelength conversion element is output to the outside of the resonator, and is returned to the wavelength conversion element by a retroreflection unit, the higher harmonic wave returned by the retroreflection unit is spatially displaced, and is superimposed on the other higher harmonic wave generated from the wavelength conversion element, and is output to the outside, wherein the one of the two higher harmonic waves generated from the wavelength conversion element is superimposed on the other higher harmonic wave such that an area of the beam with the one higher harmonic wave is displaced from that of the beam with the other higher harmonic wave in at least any one of x-axis, y-axis, and z-axis directions when the one of two higher harmonic waves generated from the wavelength conversion element is output to the outside of the resonator, is reflected by the retroreflection unit, and is returned to the wavelength conversion element where a y-axis represents a direction perpendicular to the surface of a substrate on which the resonant mirrors forming the resonator are mounted, a z-axis represents a direction extending along an optical axis of light introduced into the retroreflection unit, and an x-axis represents a direction perpendicular to the y-axis and z-axis.