Patent ID: 6489177
Filing Date: 2002-12-03
Classification: H01S

Abstract:
A semiconductor laser comprising:a semiconductor substrate having a laser section and a modulator section; a light waveguide having an active layer on said substrate and extending across said laser section and said modulator section from a high reflectivity end portion to a low reflectivity end portion; an embedding structure for enclosing said light waveguide, said embedding structure covering a top surface of said waveguide and extending along side surfaces of said waveguide, the embedding structure having a pair of high resistance regions on each of said side surfaces of the light waveguide for confining electrons between said high resistance regions; first and second elongated contact regions formed on said embedding structure corresponding respectively to said laser section and said modulator section; an insulating layer for covering portions other than said first and second elongated contact regions; and first and second electrodes formed on said insulating layer for establishing ohmic contact with said first and second contact regions, respectively.