Fiber optic central tube cable with bundled support member

• US 20030113079A1
• Filed: 12/18/2001
• Published: 06/19/2003
• Est. Priority Date: 12/18/2001
• Status: Active Grant

• Current Assignee: Draka-Comteq USA Incorporated (Draka-Comteq)
• Original Assignee: Alcatel SA (Nokia Corporation)
• Inventors: Storaasli, Olaf
• Granted Patent: US 6,987,916 B2
• Time in Patent Office: Days
• US Class Current: 385/111
• CPC Class Codes: G02B 6/441 built up from sub-bundles G02B6/4429, G02B6/4439, G02B6/4479 take precedence
• CPC Class Codes: G02B 6/4413 Helical structure
• CPC Class Codes: G02B 6/4434 Central member to take up tensile loads

Abstract

A central tube cable, including a cable jacket defining an optical fiber cavity therein; at least one radial strength member embedded in the jacket; a plurality of optical fibers disposed within the optical fiber cavity; and a bundle support member disposed inside the optical fiber cavity to limit movement of the optical fibers with respect to the bundle support member. The optical fibers are preferably housed in buffer tubes and at least some of the buffer tubes contact the bundle support member. The buffer tubes are either helically stranded around the bundle support member or are S-Z stranded. The optical fibers may be provided in the form of optical fiber ribbons that are located in the optical fiber cavity.

Claims

1. A central tube cable, comprising:

a cable jacket defining an optical fiber cavity therein;

at least one radial strength member embedded in said jacket;

a plurality of optical fibers disposed within said optical fiber cavity; and

a bundle support member disposed inside said optical fiber cavity to limit movement of said optical fibers with respect to said bundle support member.

2. The central tube cable of claim 1, wherein said optical fibers are helically wound around said bundle support member.

3. The central tube cable of claim 1, where said optical fibers are S-Z stranded around said bundle support member.

4. The central tube cable of claim 1, wherein said bundle support member is rigid.

5. The central tube cable of claim 1, wherein said bundle support member is flexible.

6. The central tube cable of claim 1, further comprising a plurality of buffer tubes in which said optical fibers are respectively housed.

7. The central tube cable of claim 6, wherein at least some of said buffer tubes contact said bundle support member.

8. The central tube cable of claim 7, wherein said buffer tubes are helically stranded around said bundle support member.

9. The central tube cable of claim 7, wherein said buffer tubes are S-Z stranded around said bundle support member.

10. The central tube cable of claim 1, wherein said optical fibers are held together as an optical fiber ribbon.

11. The central tube cable of claim 10, wherein said optical fibers are held together as a plurality of optical fiber ribbons.

12. The central tube cable of claim 11, wherein said optical fiber ribbons are helically stranded around said bundle support member.

13. The central tube cable of claim 11, where said optical fiber ribbons are S-Z stranded around said bundle support member.

14. A central tube cable, comprising:

a cable jacket defining an optical fiber cavity therein;

a plurality of optical fibers disposed within said optical fiber cavity; and

a bundle support member disposed inside said optical fiber cavity to limit movement of said optical fibers with respect to said bundle support member, said bundle support member being string-like.

15. The central tube cable of claim 14, wherein said optical fibers are helically wound around said bundle support member.

16. The central tube cable of claim 14, where said optical fibers are S-Z stranded around said bundle support member.

17. The central tube cable of claim 14, further comprising a plurality of buffer tubes in which said optical fibers are respectively housed.

18. The central tube cable of claim 17, wherein at least some of said buffer tubes contact said bundle support member.

19. The central tube cable of claim 18, wherein said buffer tubes are helically stranded around said bundle support member.

20. The central tube cable of claim 18, wherein said buffer tubes are S-Z stranded around said bundle support member.

21. The central tube cable of claim 14, wherein said optical fibers are held together as an optical fiber ribbon.

22. The central tube cable of claim 14, wherein said optical fibers are held together as a plurality of optical fiber ribbons.