Fiber optic connector

Patent metadata

Field	Value
Publication number	US-9322998-B2
Application number	US-201313759420-A
Country	US
Kind code	B2
Filing date	Feb 5, 2013
Priority date	Jan 15, 2013
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

A fiber optic connector includes a ferrule. The ferrule includes an inner piece including silica and an outer piece including ceramic. The outer piece surrounds the inner piece and the inner piece extends beyond an end of the outer piece by a distance of at least 10 micrometers.

First claim

What is claimed is:

1. A method of manufacturing a fiber optic connector, comprising:
stripping an optical fiber of one or more polymeric coatings to expose a glass cladding of the optical fiber;
inserting the optical fiber into an inner piece of a ferrule, wherein the inner piece comprises fused silica;
processing the optical fiber in the inner piece of the ferrule using a laser;
subsequent to the processing step, inserting the inner piece of the ferrule into an outer piece of the ferrule, wherein the outer piece comprises zirconia that is more durable than the inner piece; and
installing the ferrule into a fiber optic connector after the optical fiber and ferrule are fully assembled and processed, wherein the fiber optic connector forms an end of a fiber optic cable having the optical fiber surrounded by a jacket;
wherein inserting the ferrule into the fiber optic connector comprises positioning the ferrule within a holder, the holder being positioned within a housing, and the ferrule further positioned at the end of a lead-in tube.

2. The method of claim 1 , wherein the processing step comprises laser cleaving the optical fiber.

3. The method of claim 1 , wherein the processing step comprises bonding the optical fiber to the inner piece of the ferrule by laser welding.

4. The method of claim 1 , wherein the processing step comprises bonding the optical fiber to the inner piece of the ferrule by activating a bonding agent using the laser.

5. The method of claim 1 , wherein the processing step comprises polishing an end of the optical fiber with the laser.

6. The method of claim 1 , wherein the stripping step comprises ablating one or more polymeric coatings on the optical fiber using the laser.

7. The method of claim 1 , further comprising laser processing a stub portion of the optical fiber that extends rearward from the fiber optic connector.

8. The method of claim 1 , wherein processing the optical fiber further comprises:
using the laser to thermally form an end face of both the optical fiber and the inner piece simultaneously and bond them together.

9. The method of claim 1 , further comprising:
providing a spring between the housing and the holder.

10. The method of claim 1 , further comprising:
providing a boot between the housing and the optical fiber.

11. The method of claim 1 , wherein inserting the inner piece of the ferrule into the outer piece of the ferrule comprises positioning an end face of the inner piece substantially at or beyond an end face of the outer piece.

12. The method of claim 1 , wherein processing the optical fiber in the inner piece of the ferrule using the laser comprises providing relative motion between a laser beam and the optical fiber.

13. A method of manufacturing a fiber optic connector, comprising:
stripping an optical fiber of one or more polymeric coatings to expose a glass cladding of the optical fiber;
inserting the optical fiber into an inner piece of a ferrule, wherein the inner piece comprises fused silica;
bonding the optical fiber to the inner piece;
processing the optical fiber in the inner piece of the ferrule using a laser, wherein the laser is used to control a radius of curvature and apex offset of the optical fiber relative to an end face of the inner piece;
subsequent to the processing step, inserting the inner piece of the ferrule into an outer piece of the ferrule, wherein the outer piece comprises zirconia that is more durable than the inner piece; and
installing the ferrule into a fiber optic connector after the optical fiber and ferrule are fully assembled and processed, wherein the fiber optic connector forms an end of a fiber optic cable having the optical fiber surrounded by a jacket;
wherein installing the ferrule into the fiber optic connector comprises positioning the ferrule within a holder, the holder being positioned within a housing, and the ferrule further positioned at the end of a lead-in tube.

14. The method of claim 13 , wherein processing the optical fiber in the inner piece with the laser results in a height of the optical fiber relative to the end face of the inner piece being within ±100 nanometers (nm).

15. The method of claim 13 , further comprising:
adjusting the position of the optical fiber relative to an outer diameter of the outer piece to adjust concentricity of the optical fiber within the ferrule; and
locking the inner piece of the ferrule in place within the outer piece.

16. A method of manufacturing a fiber optic connector, comprising:
inserting multiple optical fibers into respective bores of an inner piece of a ferrule, wherein the inner piece comprises fused silica;
bonding the multiple optical fibers to the inner piece;
processing the multiple optical fibers in the inner piece of the ferrule using a laser;
subsequent to the processing step, inserting the inner piece of the ferrule into an outer piece of the ferrule, wherein the outer piece comprises zirconia that is more durable than the inner piece; and
installing the ferrule into a fiber optic connector after the optical fiber and ferrule are fully assembled and processed, wherein the fiber optic connector forms an end of a fiber optic cable having the optical fiber surrounded by a jacket,
wherein installing the ferrule into the fiber optic connector comprises positioning the ferrule within a holder, the holder being positioned within a housing, and the ferrule further positioned at the end of a lead-in tube.

17. The method of claim 16 , wherein processing the multiple optical fibers comprises using the laser control a radius of curvature and apex offset of the multiple optical fibers relative to an end face of the inner piece.

18. The method of claim 17 , wherein processing the multiple optical fibers in the inner piece with the laser results in a height of each optical fiber relative to the end face of the inner piece being within ±100 nanometers (nm).

19. The method of claim 16 , further comprising:
adjusting the position of one or more of the optical fibers relative to an outer diameter of the outer piece to adjust concentricity of the one or more optical fibers within the ferrule; and
locking the inner piece of the ferrule in place within the outer piece.

Assignees

• Miller Darrin Max
• Corning Cable Sys Llc

Inventors

• Miller Darrin Max

Classifications

• G02B6/3885

  Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type (optical ribbon cable G02B6/4403, G02B6/448) · CPC title

• G02B6/3846

  with fibre stubs · CPC title

• B23K26/082

  Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head · CPC title

• G02B6/25 Primary

  Preparing the ends of light guides for coupling, e.g. cutting · CPC title

• G02B6/3863

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