Optical receptacle and optical module comprising same

Patent metadata

Field	Value
Publication number	US-9229181-B2
Application number	US-201314386729-A
Country	US
Kind code	B2
Filing date	Mar 19, 2013
Priority date	Mar 28, 2012
Publication date	Jan 5, 2016
Grant date	Jan 5, 2016

Abstract

An optical receptacle is capable of actualizing, at low cost, optical transmission accompanying monitoring in which light of a light-emitting element is extracted in a direction along a substrate at an optical transmission body. In an embodiment, light of a light-emitting element 7 that has been incident on a first surface 2 a ( 11 ) is separated into coupling light and monitor light using total reflection at a coupling light total reflection surface 14 and a first monitor light total reflection surface 15 . The coupling light is emitted towards an optical transmission body 5 from a third surface 2 c ( 12 ), and the monitor light is emitted towards a light-receiving element 8 from the first surface 2 a ( 13 ).

First claim

The invention claimed is:

1. An optical receptacle that is capable of optically coupling a light-emitting element and an optical transmission body in a state in which the optical receptacle is disposed between a photoelectric conversion device and the optical transmission body, in which photoelectric conversion device the light-emitting element and a light-receiving element that receives monitor light for monitoring light emitted from the light-emitting element are disposed on a substrate, said optical receptacle comprising:
a first surface in an optical receptacle main body, on which the light from the light-emitting element is incident and from which the monitor light directed towards the light-receiving element is emitted;
a coupling light total reflection surface that is disposed on a second surface on a side opposite to the first surface in the optical receptacle main body so as to have a predetermined first slope angle in relation to the first surface, on which coupling light total reflection surface a portion of the light from the light-emitting element that has been incident on the first surface is internally incident at an angle of incidence that is greater than a critical angle, wherein the internally incident portion of light is totally reflected by the coupling light total reflection surface towards the optical transmission body side as coupling light to be coupled with the optical transmission body;
an end surface in the optical receptacle main body from which the coupling light that has been totally reflected by the coupling light total reflection surface is emitted towards the optical transmission body;
a first monitor light total reflection surface that is disposed on the second surface so as to be adjacent to the coupling light total reflection surface and have a predetermined second slope angle in relation to the first surface, on which first monitor light total reflection surface a remaining portion of light other than the portion of the light of the light-emitting element that has been incident on the first surface is internally incident at an angle of incidence that is greater than the critical angle, wherein the internally incident remaining portion of light is totally reflected by the first monitor light total reflection surface towards a third surface side as monitor light, in a state separated from the coupling light, wherein the coupling light total reflection surface and the first monitor light total reflection surface are formed on the second surface side by side as viewed from the light-emitting element such that the coupling light total reflection surface reflects the coupling light only, whereas the first monitor light total reflection surface reflects the monitor light only; and
a second monitor light total reflection surface that is disposed on the third surface in a position on the side of the total reflection direction of the monitor light in relation to the first monitor light total reflection surface so as to have a predetermined third slope angle in relation to the first surface so as to deviate from the optical path of the coupling light, on which second monitor light total reflection surface the monitor light that has been totally reflected at the first monitor light total reflection surface is internally incident at an angle of incidence that is greater than the critical angle, wherein the internally incident monitor light is totally reflected by the second monitor light total reflection surface towards a position corresponding to the light-receiving element on the first surface.

2. The optical receptacle according to claim 1 , wherein:
the first monitor light total reflection surface totally reflects the monitor light in a state separated from the coupling light by being disposed so as to have the second slope angle in relation to the first surface;
the coupling light total reflection surface and the first monitor light total reflection surface are disposed so as to be in point-contact in a direction perpendicular to the internal incidence direction of the light of the light-emitting element and the total reflection direction of the coupling light and the monitor light, or in linear-contact in the total reflection direction of the coupling light and the monitor light; and
the second monitor light total reflection surface is composed of an inner sloped surface of a recessing section that is formed on the second surface in a recessing manner.

3. The optical receptacle according to claim 2 , wherein:
the coupling light total reflection surface and the first monitor light total reflection surface are disposed so as to be in point-contact; and
the second monitor light total reflection surface is disposed further towards the first surface side than the optical path of the coupling light.

4. The optical receptacle according to claim 2 , wherein:
the second monitor light total reflection surface is disposed further towards the second surface side than the optical path of the coupling light.

5. The optical receptacle according to claim 2 , wherein:
a plurality of first monitor light total reflection surfaces and second monitor light total reflection surfaces are disposed.

6. The optical receptacle according to any one of claim 2 , wherein:
the coupling light total reflection surface and the first monitor light total reflection surface are disposed so as to be in linear-contact; and
the first monitor light total reflection surface is disposed towards the side of the total reflection direction of the coupling light in relation to the coupling light total reflection surface.

7. The optical receptacle according to claim 1 , wherein:
the first monitor light total reflection surface totally reflects the monitor light in a state integrated with the coupling light by being disposed so as to have the first slope angle in relation to the first surface, and the monitor is separated from the coupling light at the second monitor light total reflection surface.

8. The optical receptacle according to claim 2 , wherein:
a first lens face that enables the light of the light-emitting element to be incident towards the coupling light total reflection surface and the first monitor light total reflection surface is disposed on the first surface in a position corresponding to the light-emitting element;
a second lens face that emits the coupling light towards the optical transmission body is disposed on the third surface; and
a third lens face that emits the monitor light towards the light-receiving element is disposed on the first surface in a position corresponding to the light-receiving element.

9. An optical module comprising:
the optical receptacle according to claim 2 ; and
the photoelectric conversion device in which the light-emitting element and the light-receiving element that receives monitor light for monitoring light emitted from the light-emitting element are disposed on the substrate.

10. The optical receptacle according to claim 1 , wherein:
the coupling light total reflection surface and the first monitor light total reflection surface formed on the second surface are both constituted by a bottom surface of a recessing section, an inner surface of which forms the second surface.

Assignees

• Enplas Corp

Inventors

• Kanke Shinya

Classifications

• G02B6/4214 Primary

  the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device (G02B6/4246 takes precedence) · CPC title

• G02B6/43

  Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections · CPC title

• G02B6/423

  using guiding surfaces for the alignment · CPC title

• G02B6/4255

  Moulded or casted packages · CPC title

• G02B6/32

  having lens focusing means {positioned between opposed fibre ends (with lens being an integral part of the single fibre end G02B6/262)} · CPC title