Fusion-splice fiber optic connectors and related tools

• US 20090022457A1
• Filed: 03/17/2008
• Published: 01/22/2009
• Est. Priority Date: 07/16/2007
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Cable Systems LLC (Corning Incorporated)
• Inventors: Yow, Charles A. JR., de Jong, Michael, Leyva, Daniel JR.
• Granted Patent: US 8,408,811 B2
• Time in Patent Office: Days
• US Class Current: 385/96
• CPC Class Codes: G02B 6/2551 using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
• CPC Class Codes: G02B 6/2558 Reinforcement of splice joint
• CPC Class Codes: G02B 6/3846 with fibre stubs
• CPC Class Codes: G02B 6/38875 Protection from bending or twisting
• CPC Class Codes: G02B 6/3888 Protection from over-extension or over-compression
• CPC Class Codes: G02B 6/3889 using encapsulation for protection, e.g. adhesive, molding or casting resin

Abstract

Fiber optic connectors having an optical fiber stub that is fusion-spliced for optical connection and related tools for the fiber optic connectors are disclosed. Specifically, the connector assembly for fusion-splicing includes a fiber optic connector having an optic fiber stub and a boot attachable to the fiber optic connector. The boot is configured to transfer the majority of the axial force from the fiber optic cable to the fiber optic connector. Specifically, a splice housing for housing the fusion splice is configured for attachment to an end of the boot for transferring forces from the fiber optic cable to the boot. Consequently, the boot preferably has an extensibility of less than about 2 millimeters under an axial load of about fifteen pounds to inhibit excess forces from acting on the optical fiber stub.

Claims

1. A connector assembly for fusion-splicing, comprising:

a fiber optic connector having an optical fiber stub depending therethrough;

a boot configured for being attached to the fiber optic connector, the optical fiber stub having a length that extends past an end of the boot when the boot is attached to the fiber optic connector, wherein the boot has an extensibility of less than about 2 millimeters under an axial load of about fifteen pounds; and

a splice housing configured for being attached to the boot, the splice housing adapted for protecting a fusion splice of the optical fiber stub.

2. The connector assembly according to claim 1, wherein the boot is bendable to at least about 135 degrees.

3. The connector assembly according to claim 1, wherein the boot is between about 10 millimeters to about 60 millimeters in length.

4. The connector assembly according to claim 1, wherein the boot includes a collar and the splice housing includes a complementary groove for securing the collar therein.

5. The connector assembly according to claim 1, wherein the boot includes a flat surface formed thereon and the splice housing includes a complementary groove for securing the flat surface therein for inhibiting rotation therebetween.

6. The connector assembly according to claim 1, wherein the splice housing includes two halves configured for holding a portion of the boot.

7. The connector assembly according to claim 1, further comprising a plurality of barbs in the splice housing, the barbs adapted to engage a cable jacket.

8. The connector assembly according to claim 1, further comprising a cushion adapted for protecting a fusion-splice of the optic fiber stub in the splice housing.

9. The connector assembly according to claim 1, further comprising a connecting device for attaching the splice housing to the boot.

10. A connector assembly for fusion-splicing, comprising:

a fiber optic connector having an optical fiber stub depending therethrough; and

a boot having a first end and a second end, the first end being configured for attachment to the fiber optic connector and the second end having a collar, wherein the optical fiber stub having a length that extends past an end of the boot when the boot is attached to the fiber optic connector; and

a splice housing, the splice housing having a groove configured for securing the collar of the boot therein.

11. The connector assembly according to claim 10, wherein the boot is between about 10 millimeters to about 60 millimeters in length.

12. The connector assembly according to claim 11, the boot having an extensibility of less than about 2 millimeters under an axial load of about fifteen pounds

13. The connector assembly according to claim 11, further comprising a cushion adapted for protecting a fusion-splice of the optic fiber stub in the splice housing.

14. The connector assembly according to claim 10, further comprising a splice housing having at least two pieces.

15. The connector assembly according to claim 14, further comprising a tape adapted for protecting a fusion-splice of the optical fiber stub within the splice housing.

16. The connector assembly according to claim 10, wherein the splice housing includes a compression nut.

17. A fusion-spliced connector assembly, comprising:

a fiber optic connector having an optical fiber stub extending therethrough;

a boot having a longitudinal axis with a first end and a second end, the first end of the boot being configured for attachment to the fiber optic connector and the second end of the boot having a collar, wherein the optical fiber stub has a length that extends past an end of the boot when the boot is attached to the fiber optic connector, wherein the boot has an extensibility of less than about 2 millimeters under an axial load of about fifteen pounds.

18. The fusion-spliced connector assembly according to claim 17, the boot having a plurality of grooves defined therein that enable the boot to bend to about 90 degrees or more.

19. The fusion-spliced connector assembly according to claim 17, wherein the collar has at least one flat surface that is generally parallel to the longitudinal axis of the boot.

20. The fusion-spliced connector assembly according to claim 17, wherein the boot is about 10 millimeters to about 60 millimeters in length.

21. The fusion-spliced connector assembly according to claim 17, further comprising a splice housing configured for being secured about the collar of the boot, the collar and the splice housing cooperable to resist axial and rotational forces to inhibit the application of forces to a fused end of the optical fiber stub.

22. The fusion-spliced connector assembly according to claim 21, further comprising a tape disposed in the splice housing, the tape configured to bond about the fused end of the optical fiber stub.

23. The fusion-spliced connector assembly according to claim 17, further comprising a securing component for securing the splice housing about the boot.

24. The fusion-spliced connector assembly according to claim 17, further comprising a securing component configured for securing the splice housing about the boot, the securing component being one of a compression nut or a shrink element configured for capturing a portion of a cable strength member.