Optical receptacle and optical module

An optical receptacle to be disposed between one or more optical transmission members and a photoelectric conversion device, the photoelectric conversion device including one or more photoelectric conversion elements and one or more detecting elements disposed at a position further away from the optical transmission member relative to the photoelectric conversion element for monitoring light emitted from the photoelectric conversion elements, the optical receptacle being used for optically coupling the photoelectric conversion element and an end surface of the optical transmission member, the optical receptacle comprising:

• one or more first optical surfaces that allow light emitted from the photoelectric conversion element to be incident thereon, or that cause light emitted from the end surface of the optical transmission member and passes through inside of the optical receptacle to be emitted toward the photoelectric conversion element;
• one or more second optical surfaces that cause light incident on the first optical surface to be emitted toward the end surface of the optical transmission member, or allow light emitted from the end surface of the optical transmission member to be incident thereon;
• a light separating section disposed on an optical path between the first optical surface and the second optical surface, the light separating section separating light incident on the first optical surface into signal light directed toward an end surface side of the optical transmission member and monitoring light directed toward the detecting element side so as to move forth in an approximately opposite direction to a traveling direction of the signal light, or the light separating section causing at least one part of light incident on the second optical surface to move forth to the photoelectric conversion element side as reception light;
• and
• one or more third optical surfaces that cause the monitoring light separated at the light separating section to be emitted toward the detecting element,
• wherein an entire optical path between the first optical surface and the second optical surface is located inside the optical receptacle.