Patent ID: 7733927
Filing Date: 2010-06-08
Classification: H01S,H04N

Abstract:
1. A laser light source device, comprising: a laser light source for emitting an excitation light; a laser cavity including a fiber which contains a laser-active substance and on which the excitation light from the laser light source is incident, a first fiber grating provided at a side of the fiber toward the laser light source and having a plurality of reflection peaks, and a second fiber grating provided at a light emission end of the fiber and having a plurality of reflection peaks; a wavelength converter for converting a fundamental wave emitted from the laser cavity into a harmonic wave; a reflection wavelength varying unit capable of shifting the reflection wavelengths of the reflection peaks of the second fiber grating; and a controller for controlling the oscillation wavelength of the laser cavity by means of the reflection wavelength varying unit and controlling a phase matching condition of the wavelength converter, wherein intervals between adjacent reflection peaks of the first fiber grating are different from those between adjacent reflection peaks of the second fiber grating.