Patent ID: 6628686
Filing Date: 2003-09-30
Classification: B82Y,G02B,H01S

Abstract:
A laser for emitting light having a plurality of wavelengths and an intensity at each of the plurality of wavelengths, the laser comprising:a semiconductor quantum well structure comprising at least one quantum well layer bounded by barrier layers; a plurality of quantum well active regions formed in said at least one quantum well layer of said semiconductor quantum well structure, said plurality of quantum well active regions having effective bandgap properties which are modified relative to one another through intermixing in the active regions such that the quantum well active regions have different light emission spectra corresponding to the plurality of wavelengths; and a plurality of electrodes, one in electrical contact with each of the plurality of quantum well active regions, for applying a current to each of the plurality of quantum well active regions to control emission of the light at the plurality of wavelengths.