Compact, high-density adapter module, housing assembly and frame assembly for optical fiber telecommunications

• US 20090245743A1
• Filed: 03/27/2008
• Published: 10/01/2009
• Est. Priority Date: 03/27/2008
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Cable Systems LLC (Corning Incorporated)
• Inventors: Rodriguez, Diana, Cote, Monique L., Prevratil, Karyne P., Ozuna, Andrea M.
• Granted Patent: US 7,889,961 B2
• Time in Patent Office: Days
• US Class Current: 385/135
• CPC Class Codes: G02B 6/4452 Distribution frames
• CPC Class Codes: G02B 6/44526 Panels or rackmounts covering a whole width of the frame or rack
• CPC Class Codes: G02B 6/44528 Patch-cords; Connector arrangements in the system or in the box routing arrangements H04Q1/00
• CPC Class Codes: G02B 6/4454 with splices

Abstract

Adapter modules, housing assemblies that house the adapter modules, and frame assemblies that contain the housing assemblies are disclosed that are all relatively compact and support a relatively high density of components. The modules, assemblies and frames have configurations that take advantage of bend-insensitive cable fibers and jumper fibers. The adapter module is a cassette-like case that allows for a length of cable fiber to be wound tightly therein in a substantially circular loop configuration when closed. The housing assembly houses a plurality of adapter modules and is configured so that the cable and jumper fibers have relatively tight bends within the housing interior. The frame assembly is configured to support a plurality of stacked housing assemblies and to route the jumper fibers through routing conduits and/or routing troughs so that the jumper fibers are enclosed within the frame assembly rather than dangling outside of the frame. The cable fibers enter the back of the housing assemblies via a fiber optic cable arranged at the back of the frame assembly.

Claims

1. An adapter module that supports at least one bend-insensitive optical fiber, comprising:

first and second module sections configured to mate when folded together so as to form a module interior, the first and second module sections adapted to maintain the at least one bend-insensitive fiber in a serpentine configuration that includes at least first and second bends when the first and second module sections are open;

at least one adapter arranged at an end of the second module section and configured to connect to an end of the at least one bend-insensitive fiber; and

wherein, when the first and second module sections are folded together and mated, they enclose and support the at least one bend-insensitive fiber in a substantially circular loop configuration within the module interior.

2. The adapter module of claim 1, wherein the serpentine configuration includes a “

figure eight”

pattern.

3. The adapter module according to claim 1, further including an array of a plurality of adapters at the end of the second module section.

4. The adapter module according to claim 1, further including a splice holder supported in the first module section.

5. The adapter module according to claim 1, wherein the first module section includes an aperture formed in the curved sidewall and sized to allow the at least one bend-insensitive fiber to enter the module interior from outside the module interior.

6. The adapter module of claim 1, wherein at least one of the curved sidewalls and curved inner walls of the first and second module sections includes at least one tongue configured to guide and maintain the at least one bend-insensitive fiber in its configuration within the closed module interior.

7. The adapter module of claim 1, further including at least one jumper fiber connected to the at least one adapter.

8. The adapter module of claim 7, wherein the at least one optical fiber contained within the adapter module interior is a cable fiber, and the adapter module further including:

a plurality of bend-insensitive cable fibers operably connected to a corresponding plurality of adapters at a first end of the adapters within the adapter module interior.

9. The adapter module of claim 7, further including:

a plurality of bend-insensitive jumper fibers operably connected to a corresponding plurality of adapters at a second end of the adapters outside of the adapter module interior.

10. The adapter module of claim 1, wherein the first and second module sections are connected by a hinge section configured to allow the first and second module sections to fold together and mate.

11. The adapter module of claim 1, wherein the first and second modules each including a curved sidewall and a curved inner wall that serve to maintain the at least one bend-insensitive fiber in the serpentine configuration.

12. A housing assembly for containing one or more adapter modules each having at least one adapter, so as to connect at least one bend-insensitive cable fiber having an end to at least one bend-insensitive jumper fiber having an end, comprising:

a cover that defines a cover interior region with a rectangular cross-section and an open cover end;

a drawer configured to clearance fit within the cover and slideably move into and out of the cover interior region to open and close the drawer, the drawer having means for holding the one or more adapter modules; and

wherein the at least one bend-insensitive cable fiber enters a rear portion of the cover and is arranged in a serpentine configuration having at least first and second bends and connected at its end to at least one of the one or more adapter modules, wherein the serpentine configuration respectively expands and contracts when the drawer is opened and closed.

13. The housing assembly of claim 12, wherein the drawer includes a back panel having a curved top portion that serves to maintain the at least one bend-insensitive cable fiber in its serpentine configuration at the second bend.

14. The housing assembly of claim 12, wherein the means for holding the one or more adapter module includes a plurality of blade-like support members that define one or more slots configured to contain the one or more adapter modules.

15. The housing assembly of claim 14, wherein the support members are configured to allow the adapter modules to be lifted upwardly away from the back panel.

16. The housing assembly of claim 12, wherein the means for holding the one or more adapter modules includes stacked trays configured to support the one or more adapter modules in one or more layers within the drawer.

17. The housing assembly of claim 12, wherein the drawer includes a front panel and wherein the at least one adapter of the adapter module faces the front panel so as to define a front panel gap therebetween.

18. The housing assembly of claim 17, further including the at least one bend-insensitive jumper fiber, wherein the at least one jumper fiber enters the cover and a portion of the at least one jumper fiber runs toward the front panel and bends so as to connect at its end to an adapter of one of the one or more adapter modules.

19. The housing assembly of claim 18, wherein a portion of the jumper fiber resides in the front panel gap when the jumper fiber is connected to the one or more adapter modules.

20. The housing assembly of claim 18, wherein the jumper fiber enters an aperture formed in a side of the cover and is configured to include a first bend that causes a portion of the jumper fiber to first run away from the front panel and then a second bend that causes a portion of the jumper fiber to run toward the front panel.

21. The housing assembly of claim 18, wherein the jumper fiber enters an aperture formed in a side of the cover and is configured so that a portion of the jumper fiber runs directly toward the front panel.

22. The housing assembly of claim 17, wherein the drawer includes a bottom panel that supports a fiber guide member that guides a portion of the at least one jumper fiber toward the front panel.

23. The housing assembly of claim 12, wherein:

the cover includes at least one first drawer guide member; and

the drawer includes at least one second drawer guide member configured to operably engage with the at least one first drawer guide member so that the drawer can be moved in and out of the cover interior.

24. A frame assembly, comprising:

a frame in the form of an inverted “

U”

that includes first and second vertical side bars, a top horizontal cross bar, and a base connected to the side bars, the frame having a front side and a backside and defining a frame interior;

a plurality of housing assemblies according to claim 12 arranged within the frame interior in a stacked manner.

25. The frame assembly of claim 24, including a plurality of bend-insensitive cable fibers fed into a corresponding plurality of the housing assemblies via a fiber optic cable arranged at the frame backside.

26. The frame assembly of claim 24, further comprising at least one routing conduit having open opposite ends and an interior and attached to at least one of the vertical side bars and that serves to route the at least one jumper fiber to at least one of the housing assemblies.

27. The frame assembly of claim 26, wherein the frame assembly further includes:

two or more routing guides;

at least one routing trough having opposite ends and that runs horizontally so that the trough opposite ends are adjacent the open ends of two different routing guides so as to serve to route the at least one jumper fiber from one side of the frame to the other.

28. The frame assembly of claim 27, further comprising:

a first plurality of jumper fibers connected to a corresponding first plurality of adapters of the one or more adapter modules and that are carried by said routing guides and/or said at least one routing trough; and

a second plurality of cable fibers arranged at a backside of the frame and connected to a second corresponding plurality of adapters of the adapter modules.

29. The frame assembly of claim 26, wherein the at least one routing guide conduit has a door that opens to the routing guide interior.

30. The frame assembly of claim 27 including two or more frames arranged adjacent to one another, with each frame supporting a plurality of stacked housing assemblies configured to be optically connected to one another using a plurality of jumper fibers routed via vertically oriented routing conduits and/or horizontally oriented routing troughs.

31. The frame assembly of claim 24, wherein the frame assembly has a footprint of about two square feet.