Drop cable assembly

Patent metadata

Field	Value
Publication number	US-9568701-B2
Application number	US-201514800109-A
Country	US
Kind code	B2
Filing date	Jul 15, 2015
Priority date	Jul 15, 2014
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

Drop cable assemblies suitable for an optical fiber distribution system are disclosed. For some embodiments, the drop cable assembly splits an input optical fiber to a plurality of optical fibers and provides optical connection to designated premises. For other embodiments, the drop cable assembly receives multi-fiber optical connection and provides the optical connections to designated premises.

First claim

What is claimed is:

1. A drop cable assembly for a connectorized optical fiber cable, comprising:
a closure having a receptacle at a first end, wherein the receptacle receives and terminates the connectorized optical fiber cable and the closure contains an input optical fiber optically connected to a corresponding optical fiber in the connectorized optical fiber cable;
a splitter optically connected to the input optical fiber within the closure, wherein the splitter splits the input optical fiber into a plurality of output fibers;
a plurality of furcation legs extending from a second end of the closure to the outside of the closure for separating the output optical fibers, wherein each furcation leg has pre-determined length to reach a designated premise;
an optical connection port at the end of the furcation leg, wherein the optical connection port terminates the output optical fiber and is adapted to be mated with and optically connected to a corresponding optical fiber within the designated premise at the designated premise.

2. The drop cable assembly of claim 1 further comprises a splice tray to accommodate splice points between the splitter and the output optical fibers within the closure.

3. The drop cable assembly of claim 1 , wherein the drop cable assembly is pre-fabricated.

4. The drop cable assembly of claim 1 , wherein the splitter splits the input optical fiber into n output optical fibers, wherein n is a natural number.

5. The drop cable assembly of claim 4 , wherein n is 4, 8, 12, 16, 20 or 24.

6. The drop cable assembly of claim 1 , wherein the splitter is a planar light circuit (PLC).

7. The drop cable assembly of claim 1 , wherein the pre-determined length of each furcation leg is calculated based on a field survey.

8. The drop cable assembly of claim 1 , wherein the pre-determined length of each furcation leg is 0 to 10% longer than the actual distance between the closure of the drop cable assembly and the designated premise.

9. The drop cable assembly of claim 1 , wherein the optical connection port at the end of the furcation leg is a receptacle for receiving a connectorized optical fiber cable that contains the corresponding optical fiber within the designated premise.

10. The drop cable assembly of claim 1 , wherein the optical connection port at the end of the furcation leg is an optical fiber connector for mating with a receptacle of an optical fiber cable that contains the corresponding optical fiber within the designated premise.

11. The drop cable assembly of claim 1 , wherein the drop cable assembly is outside plant (OSP) rated.

12. An FTTX network comprising:
a connectorized optical fiber cable having at least one optical fiber along the length of the cable;
a drop cable assembly for the connectorized optical fiber cable, comprising:
a closure having a receptacle at a first end, wherein the receptacle receives and terminates the connectorized optical fiber cable and the closure contains an input optical fiber optically connected to the corresponding at least one optical fiber in the connectorized optical fiber cable;
a splitter optically connected to the input optical fiber within the closure, wherein the splitter splits the input optical fiber into a plurality of output fibers;
a plurality of furcation legs extending from a second end of the closure to the outside of the closure for separating the output optical fibers, wherein each furcation leg has a pre-determined length to reach a designated premise;
an optical connection port at the end of the furcation leg, wherein the optical connection port terminates the output optical fiber and is adapted to be mated with and optically connected to a corresponding optical fiber within the designated premise; and
an optical network connection terminal for receiving the optical connection port of the drop cable assembly to mate with and optically connect to the corresponding optical fiber within the designated premise at the designated premise.

13. A multi-fiber drop cable assembly for a connectorized optical fiber cable, comprising:
a closure having a multi-fiber receptacle at a first end, wherein the receptacle receives and terminates the connectorized optical fiber cable and the closure contains a plurality of optical fibers optically connected to a corresponding plurality of optical fibers in the connectorized optical fiber cable;
a plurality of furcation legs extending from a second end of the closure to the outside of the closure for separating the optical fibers, wherein each furcation leg has a pre-determined length to reach a designated premise;
an optical connection port at the end of the furcation leg, wherein the optical connection port terminates the optical fiber and is adapted to be mated with and optically connected to a corresponding optical fiber within the designated premise at the designated premise.

14. The multi-fiber drop cable assembly of claim 13 , wherein the connectorized optical fiber cable is terminated by a multi-fiber connector.

15. The drop cable assembly of claim 13 further comprises a splice tray to accommodate splice points between the multi-fiber receptacle and the plurality of optical fibers within the closure.

16. The multi-fiber drop cable assembly of claim 13 , wherein the drop cable assembly is pre-fabricated.

17. The multi-fiber drop cable assembly of claim 13 , wherein the pre-determined length of each furcation leg is calculated based on a field survey.

18. The multi-fiber drop cable assembly of claim 13 , wherein the pre-determined length of each furcation leg is 0 to 10% longer than the actual distance between the closure of the drop cable assembly and the designated premise.

19. The multi-fiber drop cable assembly of claim 13 , wherein the optical connection port at the second end of the furcation leg is a receptacle for receiving a connectorized optical fiber cable that contains the corresponding optical fiber within the designated premise.

20. The multi-fiber drop cable assembly of claim 13 , wherein the optical connection port at the second end of the furcation leg is an optical fiber connector for mating with a receptacle of an optical fiber cable that contains the corresponding optical fiber within the designated premise.

21. The multi-fiber drop cable assembly of claim 13 , wherein the multi-fiber drop cable assembly is outside plant (OSP) rated.

22. An FTTX network comprising:
a connectorized optical fiber cable having a plurality of optical fibers along the length of the cable;
a multi-fiber drop cable assembly for the connectorized optical fiber cable, comprising:
a closure having a multi-fiber receptacle at a first end, wherein the receptacle receives and terminates the connectorized optical fiber cable and the closure contains a plurality of optical fibers optically connected to the corresponding plurality of optical fibers in the connectorized optical fiber cable;
a plurality of furcation legs extending from a second end of the closure to the outside of the closure for separating the optical fibers, wherein each furcation leg has a pre-determined to reach a designated premise;
an optical connection port at the end of the furcation leg, wherein the optical connection port terminates the optical fiber and is adapted to be mated with and optically connected to a corresponding optical fiber within the designated premise; and
an optical network connection terminal for receiving the optical connection port of the drop cable assembly to ma

Assignees

• Ofs Fitel Llc

Inventors

• Czosnowski Wladyslaw
• Hendrickson Daniel

Classifications

• G02B6/44526

  Panels or rackmounts covering a whole width of the frame or rack · CPC title

• G02B6/44528

  Patch-cords; Connector arrangements in the system or in the box (routing arrangements H04Q1/00) · CPC title

• G02B6/125

  Bends, branchings or intersections · CPC title

• G02B6/4472 Primary

  Manifolds · CPC title

• G02B6/2804

  forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers · CPC title