Patent ID: 9118167
Filing Date: 2015-08-25
Classification: B82Y,H01S

Abstract:
1. A vertical cavity surface emitting laser comprising a layered structure including an active layer including a quantum well, a first cladding layer and a second cladding layer between which the active layer is interposed, a first multilayer reflector layer arranged on a side of the first cladding layer opposite to that on which the active layer is arranged, a second multilayer reflector layer arranged on a side of the second cladding layer opposite to that on which the active layer is arranged, a first electrode connected to the first cladding layer, and a second electrode connected to the second cladding layer, at least one of the first cladding layer and the second cladding layer including a low activity energy layer having a band gap that is smaller than a smallest band gap of an optical confinement layer in the quantum well of the active layer and larger than a band gap of the quantum well; wherein further comprising an oxidized constriction layer arranged between the second cladding layer and the second multilayer reflector layer, wherein the low activity energy layer is formed in the second cladding layer.