Patent ID: 7012939

Claim:
A wavelength stabilization module having a laser diode which irradiates a laser beam at the front side and the rear side thereof, the module comprising: a collimator for paralleling the laser beam irradiated at the rear side; a beam splitter for splitting the laser beam passing through the collimator into two directional laser beams; a light-receiving element for receiving one of the split laser beams; a filter for transmitting a specific wavelength of an other of the split laser beams; a light-receiving element array for receiving the laser beam passing through the filter; and a controller for controlling the output wavelength of the laser diode using the signals output from the light-receiving element and the light-receiving element array, wherein the filter and the light-receiving element array are tilted at a predetermined angle with respect to the laser beam and lock the wavelength using an incident angle dependency of the laser beam passing through the filter, and the light-receiving element array comprises a plurality of elements that detect different wavelengths.