CABLE ASSEMBLY WITH ACCESS POINT AND RIBBON STACK HANDLING

• US 20080247719A1
• Filed: 04/05/2007
• Published: 10/09/2008
• Est. Priority Date: 04/05/2007
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Cable Systems LLC (Corning Incorporated)
• Inventors: Cox, Terry Dean, Cody, Joseph Todd, Lewallen, Christopher Paul, Knecht, Dennis Michael, Luther, James Phillip
• Granted Patent: US 7,515,796 B2
• Time in Patent Office: Days
• US Class Current: 385/114
• CPC Class Codes: G02B 6/4431 with provision in the protective covering, e.g. weak line, for gaining access to one or more fibres, e.g. for branching or tapping break-out terminations G02B6/4471
• CPC Class Codes: G02B 6/4473 Three-way systems
• CPC Class Codes: G02B 6/4475 with provision for lateral branching G02B6/4431 takes precedence
• CPC Class Codes: G02B 6/4477 with means for strain-relieving to interior strengths element

Abstract

A cable assembly comprising a fiber optic cable having a ribbon stack therein, at least one network access location for accessing the ribbon stack, and a bonding fillant for locking an uncut portion of the ribbon stack to the cable at the network access location to prevent ribbon stack translation and rotation at the network access point relative to the tubular component. A method for eliminating optical fiber translation and rotation at a predetermined position within a fiber optic cable comprising providing a cable, forming an access location, filling exposed cable portions with a fillant, flowing the fillant, and curing the fillant to bond a length of the ribbon stack within the cable.

Claims

1. A cable assembly, comprising:

a fiber optic cable including a ribbon stack therein;

at least one network access location positioned along the fiber optic cable at a mid-span location where a portion of the fiber optic cable is removed so as to form a first open end and a second open end at the mid-span location, and at which at least one fiber of the ribbon stack is preterminated at the network access point; and

a coupling fillant at least partially disposed within the fiber optic cable so as to fix the ribbon stack to the fiber optic cable about the network access location to substantially prevent ribbon stack translation and rotation at the network access point relative to the fiber optic cable.

2. A cable assembly according to claim 1, wherein the fiber optic cable further comprises at least one of a tubular component and at least one strength element and wherein the ribbon stack is coupled to at least one of the at least one tubular component and the at least one strength element.

3. A cable assembly according to claim 1, further comprising at least one anti-torque insert positioned between the ribbon stack and the fiber optic cable at one of the first open end or the second open end.

4. A cable assembly according to claim 1, wherein the coupling fillant is selected from the group consisting of an epoxy, a soft elastomer and a viscous gel.

5. A cable assembly according to claim 1, wherein the fiber optic cable further comprises a water-swellable tape and a blocking gel residing in the fiber optic cable at the network access point to block the flow of the coupling fillant within the fiber optic cable.

6. A cable assembly according to claim 1, further comprising a flexible covering positioned over the network access point and at least one tether cable attached to the network access point and having at least one optical fiber therein that is spliced to the preterminated fiber of the ribbon stack.

7. A method for inhibiting optical fiber translation and rotation at a predetermined position within a fiber optic cable, comprising:

providing a fiber optic cable having a ribbon stack disposed therein;

removing a portion of the fiber optic cable at a mid-span location to access the ribbon stack, thereby forming a first open end and a second open end in the fiber optic cable;

inserting a fillant into the first open end and the second open end of the fiber optic cable so as to fix the ribbon stack to the fiber optic cable to prevent translation and rotation of the ribbon stack relative to the fiber optic cable.

8. A method according to claim 7, wherein the fillant is flexible after curing.

9. A method according to claim 7, wherein the fillant is a soft elastomer.

10. A method according to claim 7, wherein the fillant is an epoxy material.

11. A method according to claim 7, further comprising inserting one or more anti-torque inserts between the ribbon stack and the fiber optic cable.

12. A method according to claim 7, further comprising inserting a blocking gel a predetermined length down the fiber optic cable to block the flow of the fillant within the fiber optic cable.

13. A method according to claim 7, further comprising preterminating at least one fiber and splicing the at least one preterminated fiber to at least one optical fiber of a tether.

14. A method for eliminating optical fiber translation and rotation at a mid-span network access location of a fiber optic cable, comprising:

providing a fiber optic cable having a ribbon stack disposed within a core tube and a cable sheath;

removing a portion of the cable sheath and the core tube to provide an access location for accessing the underlying ribbon stack, thereby forming a first core tube open end and a second core tube open end;

applying fillant at the first core tube open end and the second core tube open end; and

flowing the fillant between the ribbon stack and the core tube a predetermined distance down the length of the fiber optic cable from the first core tube open end and the second core tube open end.

15. A method according to claim 14, wherein the fillant remains flexible after curing.

16. A method according to claim 14, wherein the fillant is an epoxy.

17. A method according to claim 14, further comprising inserting one or more anti-torque inserts between the ribbon stack and the core tube at the access location.

18. A method according to claim 14, further comprising inserting in the first core tube open end and the second core tube open end a blocking gel a predetermined length down the fiber optic cable to block the flow of the fillant within the cable.

19. A method according to claim 14, further comprising covering the access location of the fiber optic cable with a flexible covering.