Patent ID: 6590917
Filing Date: 2003-07-08
Classification: H01S

Abstract:
A surface emitting laser of the type having an active layer region composed of an active layer and spacer layers deposited on both sides thereof and reflection layers deposited on sides of the active layer region, which comprises a first mode control layer which is deposited at the periphery of the center of emission of the laser beam which has been evolved in the active layer region and also on the outside of at least one of the reflection layers and which reflects the laser beam toward at least one of the reflection layers, and a transparent second mode control layer separate from the first reflection layer which is deposited at least at the periphery of the center of emission of the laser beam which has been evolved in the active layer region and is deposited between at least one of the reflection layers and the first mode control layer,wherein the transparent second mode control layer has a laser beam phase changing property to change the phase of the laser beam reflected by at least one of the reflection layers and the first mode control layer into the transparent second mode control layer such that the laser beam reflected by the at least one of the reflection layers is attenuated with the laser beam reflected by the first mode control layer, wherein the reflection layers are Distributed Bragg Reflectors (DBR).