Conductive assemblies securing optical fibers to ferrules by thermally securing bonding agents within fiber optic connector housings, and related methods and assemblies

Patent metadata

Field	Value
Publication number	US-9417397-B2
Application number	US-201414265716-A
Country	US
Kind code	B2
Filing date	Apr 30, 2014
Priority date	Apr 30, 2014
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

Conductive assemblies are disclosed for bonding an optical fiber in a ferrule by mounting the ferrule of a fiber optic connector in the conductive assembly and using the conductive assembly to convert laser beam energy to heat and apply the heat to a portion of a fiber optic ferrule sufficient to bond the optical fiber in the ferrule. In an exemplary method, an optical fiber is disposed in a bore of a ferrule. A portion of the ferrule is disposed in a conductive assembly, such that a conductive element contacts a portion of the length of the ferrule. A laser beam absorber absorbs light energy from a laser beam, and converts the energy to heat. The conductive element transfers the heat energy from the laser beam absorber to the ferrule, thereby heating the bonding agent and bonding the optical fiber in the bore of the ferrule.

First claim

What is claimed is:

1. A method of bonding an optical fiber in a ferrule comprising:
disposing an optical fiber and a bonding agent in a bore of a ferrule;
disposing the ferrule at least partially in a conductive assembly such that a conductive element of the conductive assembly contacts a portion of the ferrule;
directing a laser beam at a laser beam absorber of the conductive assembly, wherein the laser beam absorber is thermally connected to the conductive element, and wherein energy from the laser beam is absorbed by the laser beam absorber so that heat is transferred through the conductive element to the ferrule to bring the bonding agent to a securing temperature; and
cooling the bonding agent to secure the optical fiber in the bore of the ferrule.

2. The method of claim 1 , wherein the bonding agent is disposed in at least a bonding agent funnel of the ferrule, and further wherein the portion of the ferrule in contact with the conductive element extends substantially between a tip of the ferrule and at least the bonding agent funnel when the ferrule is at least partially disposed in the conductive assembly.

3. The method of claim 1 , wherein a tip of the ferrule does not contact the conductive element when the ferrule is disposed in the conductive assembly.

4. The method of claim 1 , wherein the conductive element contacts the portion of the ferrule substantially around a perimeter of the ferrule when the ferrule is disposed in the conductive assembly.

5. The method of claim 1 , wherein the bonding agent comprises an epoxy resin configured to be activated when heated to a securing temperature between 85° C. and 200° C.

6. The method of claim 1 , wherein the ferrule is at least partially disposed within a fiber optic connector housing when the laser beam is directed at the laser beam absorber.

7. The method of claim 6 , wherein the conductive element transfers heat to the portion of the ferrule such that the bonding agent reaches the securing temperature without the fiber optic connector housing exceeding a maximum operating temperature.

8. The method of claim 7 , wherein the conductive element transfers heat to the portion of the ferrule such that the bonding agent reaches a securing temperature of at least 300° C. or more without the fiber optic connector housing exceeding a maximum operating temperature of 220° C. or less.

9. The method of claim 1 , wherein cooling the bonding agent comprises discontinuing directing a laser beam at a laser beam absorber, thereby permitting the bonding agent to cool to an ambient temperature.

10. The method of claim 1 , wherein cooling the bonding agent comprises removing the ferrule from the conductive assembly.

11. A system for producing a fiber optic cable assembly, comprising:
a ferrule having a bore with a bonding agent disposed therein;
an optical fiber disposed within the bore of the ferrule and at least partially surrounded by the bonding agent;
a laser configured to emit a laser beam; and
a conductive assembly comprising:
a laser beam absorber configured to absorb energy from the laser beam as heat; and
a conductive element connected to the laser beam absorber and contacting a portion of the ferrule, the conductive element being configured to transfer heat from the laser beam absorber to the ferrule to activate the bonding agent and thereby secure the optical fiber to the ferrule.

12. The system of claim 11 , wherein the bonding agent is disposed in at least a bonding agent funnel of the ferrule, and further wherein the portion of the ferrule in contact with the conductive element extends substantially between a tip of the ferrule and the at least a bonding agent funnel.

13. The system of claim 11 , wherein a tip of the ferrule does not contact the conductive element.

14. The system of claim 11 , wherein the conductive element contacts the portion of the ferrule substantially around a perimeter of the ferrule.

15. The system of claim 11 , wherein a maximum operating temperature of a fiber optic connector housing is 220° C. or less, and a securing temperature of the bonding agent is 300° C. or more.

Assignees

• Corning Optical Communications LLC

Inventors

• Kobyakov Andrey
• Zakharian Aramais

Classifications

• G02B6/3861 Primary

  Adhesive bonding (adhesives in general C09J) · CPC title

• G02B6/38 Primary

  having fibre to fibre mating means · CPC title