High density fiber optic hardware

• US 20080145013A1
• Filed: 12/13/2006
• Published: 06/19/2008
• Est. Priority Date: 12/13/2006
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Cable Systems LLC (Corning Incorporated)
• Inventors: Hurley, William, Luther, James P., Sanchez, Manuel Alejandro Lopez, Lewallen, Christopher Paul, Mitchell, Todd Edward, Garcia, Cesar Geronimo, Salinas, Octavio Beltran, Giraud, William, Escoto, Alejandro Raigoza, Pavon, Gerardo
• Granted Patent: US 7,496,268 B2
• Time in Patent Office: Days
• US Class Current: 385/135
• CPC Class Codes: G02B 6/02357 Property of longitudinal structures or background material varies radially and/or azimuthally in the cladding, e.g. size, spacing, periodicity, shape, refractive index, graded index, quasiperiodic, quasicrystals
• CPC Class Codes: G02B 6/02366 Single ring of structures, e.g. "air clad"
• CPC Class Codes: G02B 6/14 Mode converters
• CPC Class Codes: G02B 6/4441 Boxes
• CPC Class Codes: G02B 6/4472 Manifolds

Abstract

There is provided fiber optic hardware and hardware components adapted to provide a desired amount of fiber optic connectivity and/or functionality for a desired amount of volume, materials, etc. The fiber optic hardware components include, but are not limited to multiports, local convergence points (LCPs), particularly LCPs for multiple dwelling units or similar applications, network interface devices, equipment frames, and fiber distribution hubs. Certain fiber optic hardware components are adapted to accommodate microstructured optical fiber or other bend performance optical fiber.

Claims

1. A multi-port optical connection terminal for interconnecting optical fibers of one or more fiber optic drop cables with a fiber optic distribution cable, the multi-port terminal comprising:

a housing defining an exterior wall and an interior cavity;

a stub cable in optical communication with the fiber optic distribution cable;

a stub cable port provided in the exterior wall of the housing through which the stub cable passes into the interior cavity of the housing;

a plurality of connector ports provided on the exterior wall of the housing, wherein the connector ports are adapted to receive at least one fiber optic connector of an optic fiber in optical communication with the stub cable from inside the terminal and a connectorized end of a fiber optic drop cable from outside the terminal; and

a stub cable slack storage compartment defined within the interior cavity of the housing, wherein supplementary length of the stub cable is selectively retractable from the stub cable slack storage compartment.

2. A multi-port terminal according to claim 1, wherein the excess length of the stub cable is generally stored in a plurality of figure-eight formations within the stub cable slack storage compartment.

3. A multi-port terminal according to claim 1, wherein the stub cable slack storage compartment is adapted to selectively receive retracted supplementary length of the stub cable.

4. A multi-port terminal according to claim 1, wherein the optical fiber of at least the stub cable 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.

5. A multi-port terminal according to claim 4, wherein the microstructured fiber has an 8 mm macrobend induced loss at 1550 nm of less than 0.2 dB/turn.

6. An optical connection terminal for interconnecting optical fibers of one or more fiber optic subscriber cables with a fiber optic network cable, the terminal comprising:

a housing defining an exterior wall and an interior cavity, wherein the interior cavity is selectively accessible through at least one moveable wall portion;

at least one opening through the exterior wall for the ingress and egress of the one or more fiber optic subscriber cables and one or more fiber optic network cables; and

at least one splitter module within the interior cavity to split the optical signal of at least one fiber optic network cable to at least two fiber optic subscriber cables, wherein the fiber optic subscriber cables comprise subscriber fibers;

wherein the housing is adapted to define a density of subscriber fibers to unit of volume of the interior cavity of at least 50 fibers/ft³.

7. A terminal according to claim 6, wherein the housing is adapted to define a density of subscriber fibers to unit of volume of the interior cavity of at least 75 fibers/ft³.

8. A terminal according to claim 6, wherein the at least one splitter module comprises an input adapter for at least one fiber optic network cable and a plurality of output adapters for the at least two fiber optic subscriber cables and wherein the input adapter and output adapters of the at least one splitter module comprise multiple fiber adapters.

9. A terminal according to claim 6, wherein the terminal is selectively mounted on at least one of a pedestal, a cabinet, and a wall.

10. A terminal according to claim 6, wherein the optical fiber of at least one of the fiber optic network cable and the fiber optic subscriber cable 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.

11. A terminal according to claim 10, wherein the microstructured fiber has an 8 mm macrobend induced loss at 1550 nm of less than 0.2 dB/turn.

12. A fiber optic equipment rack for interconnecting optical fibers of one or more fiber optic subscriber cables with a fiber optic network cable in an indoor environment, the equipment rack comprising:

a frame comprising at least two vertical supports and at least one horizontal support joined therebetween; and

at least one subscriber termination module selectively mounted to the frame, wherein the at least one subscriber termination module provides for selective optical connection of one or more fiber optic subscriber cables with one or more fiber optic network cables at a subscriber termination;

wherein the at least one subscriber termination module defines a density of subscriber terminations to unit of volume of the subscriber termination module of at least 80 terminations/ft³.

13. An equipment rack according to claim 12, wherein the subscriber termination module defines a density of subscriber terminations to unit of volume of the subscriber termination module of at least 100 terminations/ft³.

14. An equipment rack according to claim 12, wherein the at least one termination module provides an angled connection surface for the selective optical connections of the one or more fiber optic subscriber cables and the one or more fiber optic network cables, wherein the connection surfaces are angled relative to a front face of the frame defined by the vertical supports and horizontal support.

15. An equipment rack according to claim 12, wherein the at least one termination module comprises at least 72 optical connections between fiber optic subscriber cables and fiber optic network cables.

16. An equipment rack according to claim 12, wherein the optical fiber of at least one of the fiber optic network cable and the fiber optic subscriber cable 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.

17. An equipment rack according to claim 16, wherein the microstructured fiber has an 8 mm macrobend induced loss at 1550 nm of less than 0.2 dB/turn.

18. A fiber distribution hub for interconnecting optical fibers of one or more fiber optic subscriber cables with a fiber optic network cable, the fiber distribution hub comprising:

a housing defining an exterior wall and an interior cavity, wherein the interior cavity is selectively accessible through at least one moveable wall portion;

at least one opening through the exterior wall for the ingress and egress of the one or more fiber optic subscriber cables and one or more fiber optic network cables;

at least one splitter module within the interior cavity to split the optical signal of at least one fiber optic network cable to a plurality of network pigtails; and

at least one subscriber termination field mounted within the housing and adapted to selectively optically connect the network pigtails to the fiber optic subscriber cables at subscriber terminations;

wherein the housing defines a density of subscriber terminations to unit of volume of the housing of at least 100 terminations/ft³.

19. An equipment rack according to claim 18, wherein the housing defines a density of subscriber terminations to unit of volume of the housing of at least 150 terminations/ft³.

20. A fiber distribution hub according to claim 18, further comprising a swing frame within the interior cavity of the housing, wherein at least one of the at least one splitter module and the at least one subscriber termination field is mounted to the swing frame.

21. A fiber distribution hub according to claim 18, wherein the fiber distribution hub is mounted on at least one of a pole, a pad, and a surface.

22. A fiber distribution hub according to claim 18, wherein the optical fiber of at least one of the fiber optic network cable, the plurality of network pigtails, and the fiber optic subscriber cables 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.

23. A fiber distribution hub according to claim 22, wherein the microstructured fiber has an 8 mm macrobend induced loss at 1550 nm of less than 0.2 dB/turn.