US 11,726,275 B2
Optical receptacle and optical module
Takahiro Izawa, Saitama (JP); and Akinobu Seki, Saitama (JP)
Assigned to Enplas Corporation, Kawaguchi (JP)
Filed by Enplas Corporation, Kawaguchi (JP)
Filed on Mar. 25, 2021, as Appl. No. 17/211,897.
Claims priority of application No. 2020-058536 (JP), filed on Mar. 27, 2020.
Prior Publication US 2021/0302673 A1, Sep. 30, 2021
Int. Cl. G02B 6/42 (2006.01)
CPC G02B 6/4215 (2013.01) [G02B 6/4214 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An optical receptacle configured to be disposed between a light emitting element and an optical transmission member and configured to optically couple the light emitting element and the optical transmission member, the optical receptacle comprising:
a first optical surface configured to allow incidence of light emitted from the light emitting element;
a second optical surface configured to emit, toward the optical transmission member, light emitted from the light emitting element and advanced inside the optical receptacle;
a third optical surface disposed on a light path between the first optical surface and the second optical surface, the third optical surface being configured to reflect, toward the second optical surface, light entered from the first optical surface; and
a diffraction grating disposed on the first optical surface, on the second optical surface, or on the light path, and
wherein the diffraction grating is configured such that zero-order diffraction light of the light emitted from the light emitting element reaches an end portion of the optical transmission member, and that primary diffraction light of the light emitted from the light emitting element does not reach the end portion of the optical transmission member.