METHODS FOR FORMING CONNECTORIZED FIBER OPTIC CABLING

• US 20090196553A1
• Filed: 04/14/2009
• Published: 08/06/2009
• Est. Priority Date: 06/08/2005
• Status: Active Grant

• Current Assignee: CommScope Inc. (CommScope Holding Company, Inc.)
• Original Assignee: CommScope Inc. (CommScope Holding Company, Inc.)
• Inventors: Case, Richard L., Anderson, Timothy W.
• Granted Patent: US 7,758,257 B2
• Time in Patent Office: Days
• US Class Current: 385/54
• CPC Class Codes: G02B 6/3885 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 Class Codes: G02B 6/38875 Protection from bending or twisting
• CPC Class Codes: G02B 6/3888 Protection from over-extension or over-compression

Abstract

A connectorized fiber optic cabling assembly includes a loose tube fiber optic cable and a connector assembly. The cable has a termination end and includes: an optical fiber bundle including a plurality of optical fibers; at least one strength member; and a jacket surrounding the optical fiber bundle and the at least one strength member. The connector assembly includes a rigid portion and defines a fiber passage. The connector assembly is mounted on the termination end of the cable such that the optical fiber bundle extends through at least a portion of the fiber passage. The plurality of optical fibers of the optical fiber bundle have a ribbonized configuration in the rigid portion of the connector assembly and a loose, non-ribbonized configuration outside the rigid portion. The plurality of optical fibers undergo a transition from the ribbonized configuration to the loose, non-ribbonized configuration in the rigid portion of the connector assembly. According to some embodiments, the rigid portion of the connector assembly includes a rigid connector housing.

Claims

1. A connectorized fiber optic cabling assembly comprising:

a) a round, loose tube fiber optic cable having a termination end and including;

an optical fiber bundle including a plurality of optical fibers;

at least one strength member; and

a jacket surrounding the optical fiber bundle and the at least one strength member; and

b) a connector assembly defining at least one fiber passage, wherein the connector assembly is mounted on the termination end of the cable such that the optical fiber bundle extends through at least a portion of the at least one fiber passage, the connector assembly including;

a rigid connector housing; and

a strain relief boot mounted on the connector housing and having a boot passage through which the cable extends, wherein the boot passage includes a front section proximate the connector housing and a rear section distal from the connector housing, wherein the front section receives a rear portion of the connector housing and the rear section receives the cable jacket and has a round shape complementary to the jacket;

c) wherein the plurality of optical fibers of the optical fiber bundle have a ribbonized configuration in the connector housing;

2. The connectorized fiber optic cabling of claim 1 wherein the rear section of the boot passage has a cylindrical shape complementary to the jacket.

3. The connectorized fiber optic cabling of claim 1 wherein the front section of the boot passage has an oval or rectangular shape.

4. The connectorized fiber optic cabling of claim 1 wherein the strain relief boot includes ribs formed about the rear section.

5. The connectorized fiber optic cabling of claim 1 wherein at least one of the jacket and the at least one strength member is directly secured to the connector housing.

6. The connectorized fiber optic cabling of claim 5 wherein the jacket and the at least one strength member are each directly secured to the connector housing.

7. The connectorized fiber optic cabling of claim 6 wherein the jacket and the at least one strength member are each directly secured to the connector housing by a crimp ring.

8. The connectorized fiber optic cabling of claim 1 including a tape and/or adhesive covering and bonding together a segment of the optical fiber bundle having the ribbonized configuration in the connector housing.

9. The connectorized fiber optic cabling of claim 1 wherein the connector assembly includes a ferrule having a plurality of side-by-side aligned fiber holes, and wherein each of the plurality of optical fibers extends through a respective one of the fiber holes.

10. The connectorized fiber optic cabling of claim 9 including an epoxy securing the plurality of optical fibers in the respective fiber holes.

11. The connectorized fiber optic cabling of claim 1 wherein the optical fiber bundle includes at least eight optical fibers.

12. A method for forming a connectorized fiber optic cabling assembly, the method comprising:

a) providing a round, loose tube fiber optic cable having a termination end and including;

an optical fiber bundle including a plurality of optical fibers having a loose, non-ribbonized configuration;

at least one strength member; and

a jacket surrounding the optical fiber bundle and the at least one strength member; and

b) mounting a connector assembly defining at least one fiber passage on the termination end of the cable such that the optical fiber bundle extends through at least a portion of the at least one fiber passage, including;

mounting a rigid connector housing of the connector assembly on the termination end of the cable such that the plurality of optical fibers of the optical fiber bundle have a ribbonized configuration in the connector housing; and

mounting a strain relief boot of the connector assembly on the connector housing, including inserting a rear portion of the connector housing in a front section of a boot passage of the strain relief boot and inserting the cable through a rear section of the boot passage, wherein the rear section has a round shape complementary to the jacket.

13. The method of claim 12 wherein the rear section of the boot passage has a cylindrical shape complementary to the jacket.

14. The method of claim 12 wherein the front section of the boot passage has an oval or rectangular shape.

15. The method of claim 12 wherein the strain relief boot includes ribs formed about the rear section.

16. The method of claim 15 including securing at least one of the jacket and the at least one strength member directly to the connector housing.

17. The method of claim 16 including securing each of the jacket and the at least one strength member directly to the connector housing.

18. The method of claim 17 including securing the jacket and the at least one strength member directly to the connector housing by crimping a crimp ring about the jacket, the at least one strength member and the connector housing.

19. The method of claim 12 including ribbonizing a segment of the optical fiber bundle prior to mounting the connector assembly on the termination end of the cable.

20. The method of claim 19 including:

cutting the jacket;

folding a flap portion of the jacket back away from the terminal end of the cable;

thereafter

ribbonizing the segment of the optical fiber bundle;

thereafter

folding the flap portion back toward the terminal end of the cable and over the connector housing; and

thereafter

securing the flap portion of the jacket to the connector housing.

21. The method of claim 19 including applying a tape and/or adhesive onto the ribbonized segment of the optical fiber bundle to retain the plurality of optical fibers in the ribbonized configuration.

22. The method of claim 12 wherein the connector assembly includes a ferrule having a plurality of side-by-side aligned fiber holes, and the method includes inserting each of the plurality of optical fibers into a respective one of the fiber holes.

23. The method of claim 22 including applying an epoxy to the connector assembly and the plurality of optical fibers to secure the plurality of optical fibers in the respective fiber holes.