Patent ID: 9213153
Filing Date: 2015-12-15
Classification: G02B

Abstract:
1. An optical receptacle that is disposed between a photoelectric conversion device and an optical fiber, in which photoelectric conversion device a light-emitting element and a light-receiving element that receives monitor light for monitoring light emitted from the light-emitting element are mounted on a substrate, said optical receptacle being capable of optically coupling the light-emitting element and an end face of the optical fiber, and comprising: a first surface of an optical receptacle main body on which the light from the light-emitting element is incident and from which the monitor light is emitted towards the light-receiving element; a first reflective surface that is disposed on a side opposite to the first surface such as to have a predetermined slope angle in relation to the first surface and such that the light of the light-emitting element that has been incident on the first surface is incident thereon, and that reflects the incident light of the light-emitting element; a light separating section having a second light reflective surface that is disposed on the side opposite to the first surface facing the light-emitting element and is disposed towards a reflection direction of the light of the light-emitting element away from the first reflective surface, and that divides the reflected light of the light-emitting element that has been reflected by the first reflective surface into (a) the monitor light that advances towards the light-receiving element through the first surface and (b) light that advances towards the end face of the optical fiber to be coupled therewith, said second light reflective surface having a slope angle such that when the light-emitting element reflected from the first reflective surface strikes the second light reflective surface at an incident angle which is smaller than a critical angle on the second reflective surface, the striking light-emitting element is totally reflected by the second light reflective surface; and a second surface of the optical receptacle main body from which the light to be coupled with the end face of the optical fiber that has been separated by the light separating section is emitted towards the end face of the optical fiber, wherein the light reaching the second surface from the first reflective surface is such that a traveling direction between the first reflective surface and the second surface is maintained at the reflection direction of the first reflective surface, and the second light reflective surface is disposed such as to have a predetermined slope angle in relation to the first surface and such that a portion of the reflected light of the light of the light-emitting element that has been reflected by the first reflective surface is incident thereon, wherein the portion of the light incident on the second reflective surface is reflected by the second reflective surface as the monitor light, and another portion of the reflected light of light of the light-emitting element that has been reflected by the first reflective surface and has not been incident on the second reflective surface is advanced towards the second surface.