Patent ID: 7817694

Claim:
A semiconductor laser apparatus comprising: a first substrate made of a nitride-based semiconductor; a first semiconductor laser chip including a first semiconductor layer that is formed on said first substrate and has a first cavity, a first one facet emitting a greater amount of a laser beam of said first cavity, and a first other facet emitting a smaller amount of the laser beam of said first cavity; a second substrate made of a gallium arsenide-based semiconductor; a second semiconductor laser chip including a second semiconductor layer that is formed on said second substrate and has a second cavity, a second one facet emitting a greater amount of a laser beam of said second cavity, and a second other facet emitting a smaller amount of the laser beam of said second cavity; and a base, wherein said first semiconductor layer has a first surface parallel to said first cavity on the opposite side to said first substrate, said second semiconductor layer has a second surface parallel to said second cavity on the opposite side to said second substrate, said base, said first semiconductor laser chip and said second semiconductor laser chip are stacked in that order, and said first cavity and said second cavity are aligned substantially parallel to each other, the length of said second substrate and said second cavity is greater than the length of said first substrate and said first cavity, a part of said second surface of said second semiconductor laser chip on said second one facet side is bonded to said first surface of said first semiconductor laser chip with an insulating film sandwiched therebetween, and a part of said second surface of said second semiconductor laser chip on said second other facet side projects from said first semiconductor laser chip and is not bonded to said first surface of said first semiconductor laser chip.