Connectorized fiber optic cabling and methods for forming the same

• US 20060280408A1
• Filed: 05/22/2006
• Published: 12/14/2006
• Est. Priority Date: 06/08/2005
• Status: Active Grant

• Current Assignee: CommScope Inc. (CommScope Holding Company, Inc.)
• Original Assignee: Commscope Solutions Properties LLC (CommScope Holding Company, Inc.)
• Inventors: Case, Richard L., Anderson, Timothy W.
• Granted Patent: US 7,537,393 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 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 including a rigid portion and 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;

c) wherein 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, and 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.

2. The connectorized fiber optic cabling of claim 1 wherein the cable is a round, loose tube fiber optic cable.

3. The connectorized fiber optic cabling of claim 1 wherein the rigid portion of the connector assembly includes a rigid connector housing.

4. The connectorized fiber optic cabling of claim 3 wherein at least one of the jacket and the at least one strength member is directly secured to the connector housing.

5. The connectorized fiber optic cabling of claim 4 wherein the jacket and the at least one strength member are each 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 by a crimp ring.

7. The connectorized fiber optic cabling of claim 3 including a strain relief boot mounted on the connector housing and having a boot passage, wherein the cable extends through the boot passage.

8. The connectorized fiber optic cabling of claim 7 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 is configured to receive a rear portion of the connector housing and the rear section has a round shape complementary to the jacket.

9. 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 rigid portion of the connector assembly.

10. 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.

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

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

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

a) providing a 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 including a rigid portion and 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, and such that 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, and 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.

14. The method of claim 13 wherein the cable is a round, loose tube fiber optic cable.

15. The method of claim 13 wherein the rigid portion of the connector assembly includes a rigid connector housing.

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 15 including mounting a strain relief boot having a boot passage on the connector housing such that the cable extends through the boot passage.

20. The method of claim 19 wherein mounting the strain relief boot on the connector housing includes inserting a rear portion of the connector housing in a front section of the boot passage and inserting the cable through a rear section of the boot passage, wherein the rear section has a round shape complementary to the jacket.

21. The method of claim 13 including ribbonizing a segment of the optical fiber bundle prior to mounting the connector assembly on the termination end of the cable.

22. The method of claim 21 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.

23. The method of claim 21 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.

24. The method of claim 13 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.

25. The method of claim 24 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.

26. A connectorized fiber optic cabling assembly comprising:

a) a 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 mounted directly on the termination end of the cable;

c) wherein the plurality of optical fibers of the optical fiber bundle have a ribbonized configuration in the connector assembly and a loose, non-ribbonized configuration outside the connector assembly and in the cable.

27. The connectorized fiber optic cabling of claim 26 wherein the cable is a round, loose tube cable.

28. The connectorized fiber optic cabling of claim 26 wherein:

the cable has a second termination end;

the connectorized fiber optic cabling further includes a second connector assembly mounted directly on the second termination end of the cable;

the at least one strength member extends continuously from the first connector assembly to the second connector assembly and is directly secured to each of the first and second connector assemblies; and

the plurality of optical fibers of the optical fiber bundle have a ribbonized configuration in the second connector assembly.

29. The connectorized fiber optic cabling of claim 28 wherein the jacket extends continuously from the first connector assembly to the second connector assembly and is directly secured to each of the first and second connector assemblies.

30. The connectorized fiber optic cabling of claim 26 wherein the plurality of optical fibers undergo a transition from the ribbonized configuration to the loose, non-ribbonized configuration in the connector assembly.

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

a) providing a 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) mounting a connector assembly directly 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 assembly and a loose, non-ribbonized configuration outside the connector assembly and in the cable.

32. The method of claim 31 wherein the cable is a round, loose tube cable.

33. The method of claim 31 including mounting a second connector assembly directly on a second termination end of the cable such that the plurality of optical fibers of the optical fiber bundle have a ribbonized configuration in the second connector assembly, and the at least one strength member extends continuously from the first connector assembly to the second connector assembly, including directly securing the at least one strength member to each of the first and second connector assemblies.