Patent ID: 7693361

Claim:
A hybrid laser diode comprising: a silicon layer defining a slab waveguide; a dielectric layer provided over the silicon layer; a first semiconductor layer of a first type provided over the dielectric layer, the first semiconductor layer being coupled to a first electrode, the first semiconductor layer being electrically isolated from the silicon layer by the dielectric layer; an active layer provided over the first semiconductor layer; a second semiconductor layer of a second type provided over the first semiconductor layer, the second semiconductor layer being coupled to a second electrode; a substrate disposed below the silicon layer; a buried insulating layer interposed between the substrate and the silicon layer; and a connection waveguide joined to and extending from the slab waveguide that is provided below the channel waveguide, the connection waveguide configured to optically couple an optical device provided in or on the buried insulating layer, wherein the first semiconductor layer, the active layer, the second semiconductor layer define a laser diode, wherein the active layer and the second semiconductor layer define a channel waveguide, the channel waveguide being provided over the slab waveguide, and wherein the connection waveguide is formed of the silicon layer and has the cross-sectional width narrower than that of the slab waveguide.