Patent ID: 7539229
Filing Date: 2009-05-26
Classification: H01S

Abstract:
1. A surface emitting laser device comprising a double channel current injection structure for uniformly applying current to an active layer, the double channel current injection structure including: a first current injection channel, which allows current to be injected toward a central portion of an aperture, which is a light beam output region of the active layer, and has a smaller diameter than the aperture; a second current injection channel, which allows current to be injected toward an edge of the aperture and is located around the aperture; a current shielding layer blocking flow of current into the active layer; a current transport layer formed on the current shielding layer and transporting current; a first current passing layer forming the first current injection channel by vertically extending through central portions of the current transport layer and the current shielding layer; and a second current passing layer forming the second current injection channel by vertically extending through edges of the current transport layer and the current shielding layer.