Patent ID: 6278137
Filing Date: 2001-08-21
Classification: H01L,H01S

Abstract:
A semiconductor laser diode including a first clad layer comprising a first conductive type AlGaAsP or AlGaAs, a second clad layer that comprises a first conductive type AlGaInP or AlInP and has a thickness of up to 0.5 .mu.m, an active layer that comprises AlGaInP or GaInP, a third clad layer that comprises a second conductive type AlGaInP or AlInP and has a thickness of up to 0.5 .mu.m, and said layers being stacked in the above described order, and said laser diode includes a fourth clad layer that comprises a second conductive type AlGaAsP or AlGaAs and a current block layer for confining an electric current in said active layer, said current block layer comprising AlGaAsP or AlGaAs, and having an index of refraction lower than that of a structure portion defining a current path.