Optical receptacle and optical module

Patent metadata

Field	Value
Publication number	US-10976510-B2
Application number	US-201816630862-A
Country	US
Kind code	B2
Filing date	Jul 13, 2018
Priority date	Jul 14, 2017
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

An optical receptacle comprises: a first optical surface; a first transmission part; a light separation unit; and a third optical surface. The light separation unit includes a reflective part and a second transmission part. Given that the optical axis of light which is incident on the first optical surface and exits the second optical surface is defined as a center axis and that an area that has an outer peripheral surface the same distance away from the center axis as the radius of the first optical surface or the second optical surface, whichever is greater, is defined as an optical effective area, the first transmission part and the second transmission part are located within the optical effective area.

First claim

What is claimed is:

1. An optical receptacle configured to optically couple a light-emitting element and an end surface of an optical transmission member when the optical receptacle is disposed between a photoelectric conversion device and the optical transmission member, the photoelectric conversion device including the light-emitting element and a detection element configured to monitor light emitted from the light-emitting element, the optical receptacle comprising:
a first optical surface configured to allow incidence of the light emitted from the light-emitting element;
a first transmission part configured to allow, to pass through the first transmission part as signal light travelling toward the end surface of the optical transmission member, a part of light entered from the first optical surface;
a light separation part configured to separate another part of the light entered from the first optical surface into monitor light travelling toward the detection element and signal light travelling toward the end surface of the optical transmission member;
a second optical surface configured to emit, toward the end surface of the optical transmission member, the signal light past the first transmission part and the signal light separated by the light separation part; and
a third optical surface configured to emit, toward the detection element, the monitor light separated by the light separation part,
wherein the light separation part includes
a reflection part that is an inclined surface inclined to an optical axis of the light entered from the first optical surface, the reflection part being configured to reflect, toward the third optical surface as the monitor light, a part of light impinging on the light separation part, and
a second transmission part disposed next to the reflection part, and configured to allow, to pass through the second transmission part as the signal light, another part of the light impinging on the light separation part, and

wherein the first transmission part and the second transmission part are located within an optical effective region, the optical effective region being a region around an optical axis of light entered from the first optical surface and emitted from the second optical surface, the optical axis being a central axis of the optical effective region, the optical effective region being a region whose outer edge is a surface whose distance to the central axis is equal to a radius of one of the first optical surface and second optical surface, the radius being larger than a radius of the other of the first optical surface and second optical surface.

2. The optical receptacle according to claim 1 , wherein the second transmission part is in contact with the first transmission part.

3. The optical receptacle according to claim 1 , wherein the second transmission part has an arch shape in a cross-section perpendicular to the optical axis of the light entered from the first optical surface.

4. The optical receptacle according to claim 1 , wherein the signal light past the second transmission part is emitted first from the second optical surface to outside of the optical receptacle.

5. The optical receptacle according to claim 1 ,
wherein the second transmission part further includes a transmission surface disposed on a light path between the first optical surface and the second optical surface, the transmission surface being perpendicular to an optical axis of the signal light separated by the light separation part; and

the optical receptacle further comprises a fourth optical surface disposed on a light path between the transmission surface and the second optical surface, the fourth optical surface being configured to allow, to re-enter the optical receptacle, the signal light emitted from the transmission surface to outside of the optical receptacle.

6. The optical receptacle according to claim 1 ,
further comprising a reflection surface disposed on a light path between the first optical surface and the first transmission part, and on a light path between the first optical surface and the light separation part, the reflection surface being configured to reflect, toward the first transmission part and the light separation part, the light entered from the first optical surface.

7. An optical module comprising:
a photoelectric conversion device including a substrate, a light-emitting element disposed on the substrate, and a detection element disposed on the substrate and configured to monitor light emitted from the light-emitting element; and
the optical receptacle according to claim 1 , wherein the first transmission part and the second transmission part are located within a light flux of light that is emitted from the light-emitting element and is entered from the first optical surface.

Assignees

• Enplas Corp

Inventors

• Kon Ayano

Classifications

• G02B6/425 Primary

  Optical features (semiconductor laser arrays H01S5/40; hybrid LED arrays H10W90/00) · CPC title

• H01S5/0683

  by monitoring the optical output parameters · CPC title

• H01S5/183

  having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL] · CPC title

• G02B6/4246 Primary

  Bidirectionally operating package structures · CPC title

• H01S5/02255

  using beam deflecting elements · CPC title