Patent ID: 7339966
Filing Date: 2008-03-04
Classification: H01S

Abstract:
1. A semiconductor laser device comprising: an n type AlGaInP-based clad layer formed on a substrate; an active layer formed on the n-type AlGaInP-based clad layer; a first p-type AlGaInP-based clad layer formed on the active layer; and a second p-type AlGaInP-based clad layer having a ridge structure formed on the first p-type AlGaInP-based clad layer, wherein the first p-type AlGaInP-based clad layer is Zn-doped with a concentration that restrains Zn diffusion into the active layer, and the second p-type AlGaInP-based clad layer is Mg-doped with a concentration higher than that of the first p-type AlGaInP-based clad layer.