Optical receptacle

Patent metadata

Field	Value
Publication number	US-2016131850-A1
Application number	US-201414900711-A
Country	US
Kind code	A1
Filing date	Jun 26, 2014
Priority date	Jun 28, 2013
Publication date	May 12, 2016
Grant date	—

Abstract

According to an aspect of the invention, an optical receptacle, comprising: a fiber stub including an optical fiber, a ferrule, and an elastic member, the optical fiber including cladding and a core conducting light, the ferrule having a through-hole fixing the optical fiber, the elastic member fixing the optical fiber in the ferrule; and a holder holding the fiber stub, the optical fiber being disposed inside the through-hole over an entire region of the optical fiber, the optical fiber including a portion, a core diameter and a fiber outer diameter in the portion decreasing gradually toward an end surface of the ferrule on a side opposite to a side to be optically connected to a plug ferrule, the elastic member being filled into a space between the optical fiber and an inner wall of the through-hole. By making the core small at the optical element side end surface of the optical fiber while contributing to shortening the optical module total length, the strength of the deformable portion of the optical fiber can be ensured; the occurrence of breaking and cracks can be prevented; and the decrease of the coupling efficiency can be prevented by suppressing the movement of the optical fiber when using the optical module.

First claim

1 . An optical receptacle, comprising:
a fiber stub including an optical fiber, a ferrule, and an elastic member, the optical fiber including cladding and a core conducting light, the ferrule having a through-hole fixing the optical fiber, the elastic member fixing the optical fiber in the ferrule; and a holder holding the fiber stub, the optical fiber being disposed inside the through-hole over an entire region of the optical fiber, the optical fiber including a portion, a core diameter and a fiber outer diameter in the portion decreasing gradually toward an end surface of the ferrule on a side opposite to a side to be optically connected to a plug ferrule, the elastic member being filled into a space between the optical fiber and an inner wall of the through-hole.

2 . The optical receptacle according to claim 1 , wherein an end surface of the optical fiber and the end surface of the ferrule exist in substantially the same plane at the end surface of the fiber stub on the side opposite to the side to be optically connected to the plug ferrule.

3 . The optical receptacle according to claim 1 , wherein
a refractive index of the core at the portion is substantially the same as the refractive index of the core other than at the portion, and a refractive index of the cladding at the portion is substantially the same as the refractive index of the cladding other than at the portion.

4 . The optical receptacle according to claim 1 , wherein a center of the core exists within a range of 0.005 millimeters from a center of the ferrule at the end surface of the fiber stub on the side opposite to the side to be optically connected to the plug ferrule.

5 . The optical receptacle according to claim 1 , wherein the end surface of the ferrule and an end surface of the optical fiber are polished to be substantially perpendicular to a central axis of the fiber stub at the end surface of the fiber stub on the side opposite to the side to be optically connected to the plug ferrule.

6 . The optical receptacle according to claim 1 , wherein an end surface of the optical fiber and a portion of the end surface of the ferrule have a prescribed angle from a plane perpendicular to a central axis of the fiber stub at the end surface of the fiber stub on the side opposite to the side to be optically connected to the plug ferrule.

Assignees

• Toto Ltd

Inventors

• Kondo Sho
• Hakozaki Satoshi
• Agatsuma Hirotsugu

Classifications

• G02B6/3863

  fabricated by using polishing techniques (grinding of the fibre ends B24B19/226) · CPC title

• G02B6/3861

  Adhesive bonding (adhesives in general C09J) · CPC title

• G02B6/3822

  with beveled fibre ends · CPC title

• G02B6/421 Primary

  the intermediate optical component consisting of a short length of fibre, e.g. fibre stub · CPC title

• G02B6/4292

  the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements · CPC title