METHODS FOR FORMING CONNNECTORIZED FIBER OPTIC CABLING

• US 20150177465A1
• Filed: 02/19/2015
• Published: 06/25/2015
• 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: Anderson, Timothy W., Case, Richard L.
• Granted Patent: US 9,229,174 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02B 6/3821 with axial spring biasing or loading means G02B6/3847 takes precedence
• CPC Class Codes: G02B 6/3834 Means for centering or aligning the light guide within the ferrule
• CPC Class Codes: G02B 6/3861 Adhesive bonding adhesives in general C09J
• CPC Class Codes: G02B 6/3882 using rods, pins or balls to align a pair of ferrule ends
• 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
• CPC Class Codes: G02B 6/3898 Tools, e.g. handheld; Tuning wrenches; Jigs used with connectors, e.g. for extracting, removing or inserting in a panel, for engaging or coupling connectors, for assembling or disassembling components within the connector, for applying clips to hold two connectors together or for crimping tools for cleaning, G02B6/3866; tools in general B25B

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

providing a loose tube fiber optic cable that includes an optical fiber bundle that has 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, wherein an end section of the optical fiber bundle extends beyond the strength member and the jacket;

receiving a portion of each optical fiber in a fiber alignment tool to align end portions of the optical fibers in a ribbonized configuration;

stripping a coating layer from the end of each of the optical fibers while the optical fibers are received in the fiber alignment tool;

inserting the ends of the optical fibers that are aligned in the ribbonized configuration within a fiber passage of a ferrule while the optical fibers are received in the fiber alignment tool; and

then

removing the fiber alignment tool from the plurality of optical fibers.

2. The method of claim 1, wherein the ends of the optical fibers are inserted into the fiber passage of the ferrule after the coating layer is stripped from the end section of each of the optical fibers.

3. The method of claim 1, wherein stripping the a coating layer from the end of each of the optical fibers comprises using a thermal heat stripping tool to strip an environmental protection layer from the end of each optical fiber.

4. The method of claim 1, further comprising:

introducing an epoxy into the ferrule;

curing the epoxy to secure the optical fibers in the ribbonized configuration within the ferrule.

5. The method of claim 4, wherein the fiber alignment tool is removed from the optical fibers after the epoxy is cured.

6. The method of claim 1, wherein receiving a portion of each optical fibers in the fiber alignment tool to align end portions of the optical fibers in the ribbonized configuration comprises:

opening a cap of the fiber alignment tool;

receiving the portions of the respective optical fibers in a base of the fiber alignment tool;

aligning the end portions of the optical fibers in the ribbonized configuration within the fiber alignment tool; and

closing the cap of the fiber alignment tool onto the base of the fiber alignment tool to hold the end portions of the optical fibers in the ribbonized configuration.

7. The method of claim 6, wherein the base of the fiber alignment tool includes at least one groove.

8. The method of claim 6, wherein at least one of the base and the cap of the fiber alignment tool includes magnets, and wherein the magnets hold the cap in place on the base.

9. The method of claim 1, further comprising:

sliding a strain relief boot and a rear housing of a connector housing onto the loose tube fiber optic cable prior to receiving the portions of the respective optical fibers in the fiber alignment tool; and

connecting a front housing of the connector housing to the rear housing of the connector housing.

10. The method of claim 9, further comprising securing at least one of the jacket and the strength member to the connector housing.

11. The method of claim 1, wherein the connectorized fiber optic assembly includes the loose tube fiber optic cable and a connector housing that is mounted on an end of the fiber optic cable, wherein the connector housing includes:

a substantially rigid front housing;

a substantially rigid rear housing; and

a strain relief boot.

12. The method of claim 1, further comprising sliding a ferrule boot onto the optical fibers before the ends of the optical fibers that are aligned in the ribbonized configuration are inserted within the fiber passage of the ferrule.

13. The method of claim 12, wherein the ferrule boot is slid onto the optical fibers before the coating layer is stripped from the end of each of the optical fibers.

14. The method of claim 12, wherein the ferrule boot is slid onto the optical fibers after the coating layer is stripped from the end of each of the optical fibers.

15. The method of claim 4, wherein a vacuum is used to draw the epoxy into the ferrule.

16. The method of claim 4, wherein the epoxy is introduced into the ferrule before the ends of the optical fibers are inserted into the fiber passage of the ferrule.