Preconnectorized fiber optic local convergence points

• US 7,519,258 B2
• Filed: 12/21/2006
• Issued: 04/14/2009
• Est. Priority Date: 12/21/2006
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Cable Systems LLC (Corning Incorporated)
• Inventors: Staber, Harley J., Wilken, Josh M.
• Primary Examiner(s): Le; Uyen Chau N
• Assistant Examiner(s): STAHL, MICHAEL J
• Application Number:
  US11/643,344
• Publication Number:
  US 20080152292A1
• Time in Patent Office: 845 Days
• Field of Search: None
• US Class Current: 385/135
• CPC Class Codes: G02B 6/4452 Distribution frames
• CPC Class Codes: G02B 6/44528 Patch-cords; Connector arrangements in the system or in the box routing arrangements H04Q1/00

Abstract

There is provided fiber optic local convergence points that provide preconnectorized functionality to eliminate all or most of the splicing associated with local convergence points in fiber optic distribution networks. The local convergence points provide a plurality of preconnectorized multi-fiber ports adapted to receive a preconnectorized end of a distribution cable within the enclosure of the local convergence point, on the enclosure itself, or outside the enclosure. For example, the local convergence point may provide preconnectorized multi-fiber ports outside the enclosure with an accumulator optically connected to the interior of the local convergence with an accumulator cable, wherein the accumulator comprises the plurality of preconnectorized multi-fiber ports.

Claims

1. An outside plant local convergence point in a fiber optic distribution network comprising at least one feeder cable and at least one distribution cable, wherein the local convergence point is adapted to provide optical connectivity between the feeder cable and the distribution cable, the local convergence point comprising:

an enclosure comprising an exterior wall and an interior cavity therein, wherein access to the interior cavity is provided through at least one door;

a splitter mounted within the interior cavity and in optical communication with at least one optical fiber of the feeder cable and adapted to provide optical connectivity between the optical fiber of the feeder cable and a plurality of pigtails;

a subscriber termination field mounted within the interior cavity and comprising a plurality of adapters for selective optical connection between a pigtail of the plurality of pigtails and a subscriber fiber; and

a plurality of preconnectorized multi-fiber ports provided on the exterior wall of the enclosure, wherein the preconnectorized multi-fiber ports are in optical communication with a plurality of subscriber fibers;

wherein the plurality of preconnectorized multi-fiber ports are adapted to receive a preconnectorized end of the distribution cable to thereby provide optical connectivity between the plurality of subscriber fibers and the distribution cable.

2. A local convergence point according to claim 1, wherein the preconnectorized multi-fiber ports comprise at least one of the following numbers of fibers:

4, 6, 8, 12, 16, 24, 32, 36, 48, 64, 72, and 96.

3. A local convergence point according to claim 1, wherein the preconnectorized multi-fiber ports include at least one alignment and keying feature adapted for mechanical interaction with at least one alignment and keying feature of the preconnectorized end of the distribution cable.

4. A local convergence point according to claim 1, wherein the plurality of preconnectorized multi-fiber ports are adapted to receive preconnectorized ends of distribution cables including one or more tethers provided at mid span access locations along the distribution cable.

5. A local convergence point according to claim 1, wherein the feeder cable is spliced to at least one stub cable in optical communication with the splitter.

6. A local convergence point according to claim 1, wherein at least one optical fiber within the enclosure comprises a microstructured optical fiber comprising a core region and a cladding region surrounding the core region, the cladding region Comprising an annular hole-containing region comprised of non-periodically disposed holes.

7. An outside plant local convergence point in a fiber optic distribution network comprising at least one feeder cable and at least one distribution cable, wherein the local convergence point is adapted to provide optical connectivity between the feeder cable and the distribution cable, the local Convergence point comprising:

an enclosure comprising an exterior wall and an interior cavity therein, wherein access to the interior cavity is provided through at least one door;

a splitter mounted within the interior cavity and in optical communication with at least one optical fiber of the feeder cable and adapted to provide optical connectivity between the optical fiber of the feeder cable and a plurality of pigtails;

a subscriber termination field mounted within the interior cavity and comprising a plurality of adapters for selective optical connection between a pigtail of the plurality of pigtails and a subscriber fiber; and

an accumulator outside the exterior wall of the enclosure and in optical connectivity with the subscriber termination field through an accumulator cable comprising a plurality of subscriber fibers, wherein the accumulator cable exits the interior cavity of the enclosure and wherein the accumulator comprises a plurality of preconnectorized multi-fiber ports adapted to receive a preconnectorized end of the distribution cable to thereby provide optical connectivity between the plurality of subscriber fibers and the distribution cable.

8. A local convergence point according to claim 7, wherein the subscriber fibers are in direct optical communication with the preconnectorized multi-fiber ports of the accumulator without any intermediate splices or connectors.

9. A local convergence point according to claim 7, wherein the subscriber fibers are in optical communication with the preconnectorized multi-fiber ports of the accumulator via a single splice.

10. A local convergence point according to claim 7, wherein the subscriber fibers are in optical communication with the preconnectorized multi-fiber ports of the accumulator via a single connection.

11. A local convergence point according to claim 7, wherein the preconnectorized multi-fiber ports comprise at least one of the following numbers of fibers:

4, 6, 8, 12, 16, 24, 32, 36, 48, 64, 72, and 96.

12. A local convergence point according to claim 7, wherein the preconnectorized multi-fiber ports include at least one alignment and keying feature adapted for mechanical interaction with at least one alignment and keying feature of the preconnectorized end of the distribution cable.

13. A local convergence point according to claim 7, wherein the plurality of preconnectorized multi-fiber ports are adapted to receive preconnectorized ends of distribution cables including one or more tethers provided at mid span access locations along the distribution cable.

14. A local convergence point according to claim 7, wherein at least one optical fiber within the enclosure comprises a microstructured optical fiber comprising a core region and a cladding region surrounding the core region, the cladding region comprising an annular hole-containing region comprised of non-periodically disposed holes.