Patent ID: 7655953
Filing Date: 2010-02-02
Classification: B82Y,G11B,H01L,H01S

Abstract:
1. A semiconductor laser apparatus comprising: a conductive support member; an insulating layer; a conductive layer formed on one surface of said insulating layer; a first semiconductor laser device having a first semiconductor layer formed on a first substrate, a first electrode formed on said first semiconductor layer, and a second electrode formed on said first substrate, and emitting a light beam of a first wavelength; and a second semiconductor laser device having a second semiconductor layer formed on a second substrate, a third electrode formed on said second semiconductor layer, and a fourth electrode formed on said second substrate, and emitting a light beam of a second wavelength, said second semiconductor layer including a current blocking layer that blocks a current that flows from said third electrode to said fourth electrode, said first semiconductor laser device being provided on said support member so that said first electrode is positioned on said support member side, said insulating layer and said conductive layer being provided in order on said second electrode of said first semiconductor laser device, said second semiconductor laser device being provided on said conductive layer so that said third electrode is electrically connected to said conductive layer, said fourth electrode being electrically connected with said second electrode, a value of capacitance induced between said second electrode and said conductive layer with said insulating layer sandwiched therebetween, being not more than a value of capacitance induced in said current blocking layer, said first semiconductor laser device having a first optical waveguide, said second semiconductor laser device having a second optical waveguide, said insulating layer having a first portion and a second portion that is different from said first portion, said first portion of said insulating layer being positioned in at least a region corresponding to a light beam emitting facet of said second optical waveguide, said first portion having a thermal conductive property higher than that of said second portion, said first portion having a thickness smaller than that of said second portion, and said first portion extends along said second optical waveguide, the width of said first portion becoming greater toward the light emitting facet side of said second optical waveguide.