Optical receptacle and optical module

An optical receptacle disposed between a plurality of light emitting elements or a plurality of light receiving elements and a plurality of optical transmission members and configured to optically couple the light emitting elements or the light receiving elements to end surfaces of the optical transmission members, respectively, the optical receptacle comprising:

• a plurality of first optical surfaces, each configured such that light emitted from a corresponding one of the light emitting elements is incident on the first optical surface, or each configured to emit light propagating therein toward a corresponding one of the light receiving elements;
• a plurality of second optical surfaces, each configured to emit the light incident on the first optical surface toward an end surface of a corresponding one of the optical transmission members, or each configured such that light from a corresponding one of the optical transmission members is incident on the second optical surface;
• a third optical surface configured to reflect the light incident on the first optical surface toward the second optical surface or configured to reflect the light incident on the second optical surface toward the first optical surface;
• a plurality of first recesses formed on a surface on which the plurality of second optical surfaces are disposed or a surface on which the plurality of first optical surfaces are disposed;
• and
• a plurality of second recesses formed on a surface opposite to a surface on which the first recesses are disposed,
• wherein the plurality of first recesses and the plurality of second recesses are disposed opposite to each other such that central axes of the first recesses coincide, respectively, with central axes of the second recesses.