Patent ID: 8089088
Filing Date: 2012-01-03
Classification: H01L,H01S

Abstract:
1. A light emitting device comprising: a first cladding layer; an active layer formed above the first cladding layer; and a second cladding layer formed above the active layer; wherein at least a portion of the active layer constitutes a gain region; the gain region is continuous from a first end surface provided to a first side surface of the active layer to a second end surface provided to the first side surface; the gain region has a first reflective surface and a second reflective surface for reflecting light generated by the gain region, the first reflective surface and second reflective surface extending from the first end surface to the second end surface; the gain region comprises: a first portion extending from the first end surface to the first reflective surface in a direction tilted with respect to a normal to the first side surface as viewed two-dimensionally; a second portion extending from the second end surface to the second reflective surface in a direction tilted with respect to a normal to the first side surface as viewed two-dimensionally; and a third portion extending from the first reflective surface to the second reflective surface in a direction tilted with respect to a normal to the first reflective surface as viewed two-dimensionally; a distributed Bragg reflector or a photonic crystal region is provided to at least one of a side of the first reflective surface and a side of the second reflective surface; at least a portion of the light generated by the gain region that passes through the first reflective surface or the second reflective surface is returned to the gain region by the distributed Bragg reflector or photonic crystal region; and the light generated by the gain region is emitted from the first end surface and the second end surface.