Patent ID: 8063408
Filing Date: 2011-11-22
Classification: H01L,H01S

Abstract:
1. An integrated semiconductor optical device including a first semiconductor optical device and a second semiconductor optical device, comprising: a substrate having a principal surface having a first area and a second area, the first semiconductor device being provided on the first area, the second semiconductor device being provided on the second area, the first area and the second area being arranged along a direction of a predetermined axis extending along the principal surface of the substrate; a first cladding layer of a first conductivity type, first cladding area being provided on the principal surface of the substrate; a first active layer provided on the first cladding layer in the first area of the principal surface of the substrate; a second active layer provided on the first cladding layer in the second area of the principal surface of the substrate; a second cladding layer of a second conductivity type opposite to the first conductivity type, the second cladding layer being provided on the second active layer; a third cladding layer of a first conductivity type, the third cladding layer being provided on the first active layer; and a tunnel junction region provided between the first active layer and the third cladding layer in the first area of the principal surface of the substrate, wherein the first semiconductor device includes the first cladding layer, the first active layer, the tunnel junction region, and third cladding layer stacked in this order, the second semiconductor device includes the first cladding layer, the second active layer, and second cladding layer stacked in this order, the first active layer of the first semiconductor device is coupled to the second active layer of the second semiconductor device by butt joint, the second cladding layer of the second semiconductor device and the third cladding layer of the first semiconductor device form a p-n junction at the boundary between the second cladding layer and the third cladding layer, the boundary extending perpendicular to the direction of the predetermined axis, the tunnel junction region includes a first conductivity type semiconductor layer, a second conductivity type semiconductor layer and a tunnel junction that is located between the first conductivity type semiconductor layer and the second conductivity type semiconductor layer, and the third cladding layer is disposed on the first conductivity type semiconductor layer in the tunnel junction region.