Patent ID: 8646959
Filing Date: 2014-02-11
Classification: G02B,H01S

Abstract:
1. A laser light source comprising: a laser element that outputs a fundamental wave as infrared light; a wavelength conversion element to which the fundamental wave is input and that wavelength-converts at least a portion of the input fundamental wave to a converted wave having a wavelength shorter than the fundamental wave and being visible light; a first waveguide that guides an output wave from the wavelength conversion element; a second waveguide that is separate from and coupled to the first waveguide and attenuates and guides a component of the fundamental wave included in the output wave from the first waveguide and outputs the converted wave; a diffraction grating that is formed in the first waveguide and locks a wavelength or a frequency of the fundamental wave output from the laser element by feeding back the fundamental wave output from the wavelength conversion element.