Optical receptacle and optical module comprising same

摘要

An optical receptacle is capable of actualizing, at low cost, optical transmission accompanying monitoring in which light of a light-emitting element is extracted in a direction along a substrate at an optical transmission body. In an embodiment, light of a light-emitting element 7 that has been incident on a first surface 2a (11) is separated into coupling light and monitor light using total reflection at a coupling light total reflection surface 14 and a first monitor light total reflection surface 15. The coupling light is emitted towards an optical transmission body 5 from a third surface 2c (12), and the monitor light is emitted towards a light-receiving element 8 from the first surface 2a (13).

主权项

1. An optical receptacle that is capable of optically coupling a light-emitting element and an optical transmission body in a state in which the optical receptacle is disposed between a photoelectric conversion device and the optical transmission body, in which photoelectric conversion device the light-emitting element and a light-receiving element that receives monitor light for monitoring light emitted from the light-emitting element are disposed on a substrate, said optical receptacle comprising:
a first surface in an optical receptacle main body, on which the light from the light-emitting element is incident and from which the monitor light directed towards the light-receiving element is emitted; a coupling light total reflection surface that is disposed on a second surface on a side opposite to the first surface in the optical receptacle main body so as to have a predetermined first slope angle in relation to the first surface, on which coupling light total reflection surface a portion of the light from the light-emitting element that has been incident on the first surface is internally incident at an angle of incidence that is greater than a critical angle, wherein the internally incident portion of light is totally reflected by the coupling light total reflection surface towards the optical transmission body side as coupling light to be coupled with the optical transmission body; an end surface in the optical receptacle main body from which the coupling light that has been totally reflected by the coupling light total reflection surface is emitted towards the optical transmission body; a first monitor light total reflection surface that is disposed on the second surface so as to be adjacent to the coupling light total reflection surface and have a predetermined second slope angle in relation to the first surface, on which first monitor light total reflection surface a remaining portion of light other than the portion of the light of the light-emitting element that has been incident on the first surface is internally incident at an angle of incidence that is greater than the critical angle, wherein the internally incident remaining portion of light is totally reflected by the first monitor light total reflection surface towards a third surface side as monitor light, in a state separated from the coupling light, wherein the coupling light total reflection surface and the first monitor light total reflection surface are formed on the second surface side by side as viewed from the light-emitting element such that the coupling light total reflection surface reflects the coupling light only, whereas the first monitor light total reflection surface reflects the monitor light only; and a second monitor light total reflection surface that is disposed on the third surface in a position on the side of the total reflection direction of the monitor light in relation to the first monitor light total reflection surface so as to have a predetermined third slope angle in relation to the first surface so as to deviate from the optical path of the coupling light, on which second monitor light total reflection surface the monitor light that has been totally reflected at the first monitor light total reflection surface is internally incident at an angle of incidence that is greater than the critical angle, wherein the internally incident monitor light is totally reflected by the second monitor light total reflection surface towards a position corresponding to the light-receiving element on the first surface.