Patent ID: 8228964
Filing Date: 2012-07-24
Classification: B82Y,H01S

Abstract:
1. A surface emitting laser, comprising: an n-type lower distributed Bragg reflector (DBR) provided on a substrate; a p-type upper DBR provided above the lower DBR; an active layer interposed between the lower DBR and the upper DBR; a current confinement layer for confining a current to be injected to the active layer, wherein the current confinement layer is interposed between the upper DBR and the active layer; a barrier structure interposed between the current confinement layer and the active layer, the barrier structure limiting the migration of a hole carrier that has passed through a current unconfining portion, in an electric field application direction; and upper cladding layers interposed between the current confinement layer and the active layer, wherein the barrier structure is interposed between the upper cladding layers, and wherein the barrier structure is made of a layer having a valence band energy lower than a valence band energy of the upper cladding layers.