Optical receptacle and optical module provided with same

Patent metadata

Field	Value
Publication number	US-9529166-B2
Application number	US-201314382503-A
Country	US
Kind code	B2
Filing date	Feb 20, 2013
Priority date	Mar 16, 2012
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

An optical receptacle has a configuration wherein light of a light-emitting element is separated into a coupling light and a monitor light by a coupling lens face portion and a monitor lens face portion of a first lens face. The coupling light is reflected by a first reflective surface and then emitted towards an optical transmission body from a coupling light emission surface. The monitor light is reflected by a second reflective surface and then emitted towards a light-receiving surface from a monitor light emission surface.

First claim

The invention claimed is:

1. A 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 lens face that is disposed on a first surface on the photoelectric conversion device side in an optical receptacle main body so that the light from the light-emitting element is incident thereon, and separates the incident light of the light-emitting element into a coupling light to be coupled with the optical transmission body and the monitor light;
a first reflective surface that is disposed on a second surface on the side opposite to the first surface in the optical receptacle main body so as to oppose the first lens face with a predetermined slope angle in relation to the first surface, at which the coupling light arrives from the first lens face side, and that reflects the arrived coupling light towards the optical transmission body side;
a coupling light emission surface that emits the coupling light that has been reflected by the first reflective surface towards the optical transmission body;
a second reflective surface that is disposed on the second surface in a position on the optical transmission body side in relation to the first reflective surface, at which the monitor light arrives from the first lens face side, and that reflects the arrived monitor light towards the light-receiving element side; and
a monitor light emission surface that emits the monitor light that has been reflected by the second reflective surface towards the light-receiving element,
wherein the first lens face includes:
a coupling lens face portion that is disposed so that a portion of light of the light from the light-emitting element is incident thereon, and that advances the incident portion of light towards the first reflective surface as the coupling light, and
a monitor lens face portion that is disposed so that the remaining portion of light, other than the portion of light, of the light from the light-emitting element is incident thereon and advances the incident remaining portion of light towards the second reflective surface as the monitor light, wherein:
the coupling lens face portion is formed into a convex surface, and
the monitor lens face portion is formed into a concave surface or a sloped plane.

2. The optical receptacle according to claim 1 , wherein:
the coupling lens face portion, the monitor lens face portion, and the monitor light emission surface are designed into planar shapes with reference to a common reference plane on the first surface; and
the first lens face has a stepped surface portion that connects the coupling lens face portion and the monitor lens face portion.

3. The optical receptacle according to claim 2 , wherein:
the stepped surface portion is disposed in parallel with an optical axis on the first lens face.

4. The optical receptacle according to claim 1 , wherein:
the coupling lens face portion and the monitor lens face portion are connected to each other.

5. The optical receptacle according to claim 1 , wherein:
the monitor lens face portion is disposed on the optical transmission body side in relation to the coupling lens face portion.

6. The optical receptacle according to claim 1 , wherein:
the second reflective surface is a total reflection surface on which the monitor light is internally incident at an angle of incidence that is greater than a critical angle and that totally reflects the internally incident monitor light.

7. The optical receptacle according to claim 6 , wherein:
the second reflective surface is formed into a plane or a convex aspherical surface.

8. The optical receptacle according to claim 6 , wherein:
the second reflective surface is composed of at least a portion of an inner bottom surface of a recessed section that is provided recessing on the second surface.

9. The optical receptacle according to claim 1 , wherein:
the first reflective surface is a total reflection surface on which the coupling light is internally incident at an angle of incidence that is greater than a critical angle and that totally reflects the internally incident coupling light.

10. The optical receptacle according to claim 1 , wherein:
the coupling light emission surface is a second lens face that emits the coupling light while converging the coupling light; and
the monitor light emission surface is a third lens face that emits the monitor light while converging the monitor light.

11. An optical module comprising:
the optical receptacle according to claim 1 ; 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.

Assignees

• Enplas Corp

Inventors

• Shibuya Kazutaka

Classifications

• G02B6/4286 Primary

  Optical modules with optical power monitoring · CPC title

• G02B27/108

  for sampling a portion of a beam or combining a small beam in a larger one, e.g. wherein the area ratio or power ratio of the divided beams significantly differs from unity, without spectral selectivity · CPC title

• G02B6/4249

  comprising arrays of active devices and fibres · CPC title

• G02B6/4214

  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

• G02B6/4204

  the coupling comprising intermediate optical elements, e.g. lenses, holograms (encapsulated active devices H01S5/02208) · CPC title