Patent ID: 6222865
Filing Date: 2001-04-24
Classification: H01S

Abstract:
A semiconductor laser comprising an active region formed by a buried heterostructure, the semiconductor laser further comprising current confinement regions laterally surrounding the active region and the semiconductor laser further comprising a top layer and a bottom layer, the top layer and the bottom layer transversely surrounding the active region, the current confinement regions and the top layer and the bottom layer together forming one of a n-p-n-p-structure and a n-SI-n-p-structure for current confinement, wherein SI designates a semi-isolating material and the semiconductor laser comprises at least one thin layer placed between a second n-doped layer and a second p-doped layer in the one of the n-p-n-p-structure and the n-SI-n-p-structure for current confinement in order to increase a forward voltage drop in the one of the n-p-n-p-structure and the n-SI-n-p-structure for current confinement and thereby reduce leakage of electrical current outside the active region.