Patent ID: 8344393
Filing Date: 2013-01-01
Classification: H01L,H01S

Abstract:
1. A light receiving and emitting device comprising: a substrate; and a light emitting unit, a first light receiving unit, and a second light receiving unit that are provided on the substrate, wherein the light emitting unit includes the first and second light receiving units include first and second light-absorbing layers, respectively, at least part of the active layer forms a gain region on a current path between the first electrode and the second electrode, the gain region is provided from a first side face of the active layer to a second side face parallel to the first side face so as to be inclined with respect to a perpendicular of the first side face as seen in a planar view, first light generated in the gain region is divided, at a first edge face on the first side face and a second edge face on the second side face, into second light emitted to an outside and third and fourth light respectively reflected at the first and second edge faces, the third light is received by the first light receiving unit, and the fourth light is received by the second light receiving unit.