Patent ID: 7045823
Filing Date: 2006-05-16
Classification: G02F,H01S,Y10S

Abstract:
1. An optical semiconductor device comprising: a substrate; a semiconductor laser including a lower clad layer, an active layer, and an upper clad layer formed in this order on said substrate; an electroabsorptive modulator including said lower clad layer, a light absorption layer, and said upper clad layer formed in this order on said substrate; a separation region provided between said semiconductor laser and said electroabsorptive modulator and including said lower clad layer, a wave guide layer, and said upper clad layer formed in this order on said substrate; and a channel from which said upper clad layer is removed, said channel being provided such that said channel surrounds said upper clad layer, said channel extending up to said side of said separation region, wherein said upper clad layer extends from said semiconductor laser through said separation region to said electroabsorptive modulator, said electroabsorptive modulator receives light generated from said semiconductor laser in a wave guide direction through the wave guide layer, said semiconductor laser, separation region, and electroabsorptive modulator each has a side provided in parallel with the wave guide direction of the light, and said upper clad layer extends in a direction crossing the wave guide direction up to said side of said separation region.