Patent ID: 6094446
Filing Date: 2000-07-25
Classification: H01S

Abstract:
A wavelength stabilizing apparatus of laser light source comprising:an optical filter composed as an interference optical filter laminating low refractive index films and high refractive index films having optical thicknesses of .lambda./4 for transmission wavelength .lambda. on a substrate alternately in multiple layers, and continuously changing the optical thicknesses so that the transmission wavelength .lambda. change continuously in a specific direction of the substrate, for receiving light of a laser light source capable of changing wavelength of light continuously, passing light of specific wavelength, and reflecting the other;a first photo detector for receiving the light transmitted through said optical filter;a second photo detector for receiving the light reflected by said optical filter;an output ratio calculator which calculates the output ratio of reception levels delivered from said first and second photo detectors;a wavelength controller which controls the emission wavelength of said laser light source in a manner that the output ratio by said output ratio calculator becomes a specified value; anda slide adjusting mechanism for changing the incident position of the incident light into said optical filter continuously in said specified direction.