Optical receptacle and optical module

An optical receptacle configured to be disposed between a photoelectric conversion device and a plurality of optical transmission members, the photoelectric conversion device including a light-emitting element, a light-receiving element and a detection device for monitoring emission light emitted from the light-emitting element which are disposed on a substrate, the optical receptacle being configured to optically couple the light-emitting element and the light-receiving element to respective end surfaces of the plurality of optical transmission members, the optical receptacle comprising:

• a first optical receptacle for transmission including a first surface, a second surface opposite to the substrate, a third surface opposite to the second surface and a first fitting part disposed on the first surface, the first optical receptacle being disposed on the substrate in such a manner that the first optical receptacle is directly opposite to the light-emitting element and the detection device;
• and
• a second optical receptacle for reception including a fourth surface, a fifth surface opposite to the substrate, a sixth surface opposite to the fifth surface and a second fitting part disposed on the fourth surface, the second fitting part being configured to be fit to the first fitting part, the second optical receptacle being disposed on the substrate in such a manner that the second optical receptacle is directly opposite to the light-receiving element,
• wherein the first optical receptacle includes a first recess and a second recess opening outward, the first recess and the second recess being formed in the third surface;
• wherein the second optical receptacle includes a third recess opening outward, the third recess being formed in the sixth surface;
• and
• wherein a part of an inner surface of each of the first recess, the second recess and the third recess is a reflection surface.