Source: https://patents.google.com/patent/USRE46701E1/en
Timestamp: 2018-04-23 20:06:25
Document Index: 144753624

Matched Legal Cases: ['Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2']

USRE46701E1 - Fiber optic local convergence points for multiple dwelling units - Google Patents
USRE46701E1
USRE46701E1 US13162115 US201113162115A USRE46701E US RE46701 E1 USRE46701 E1 US RE46701E1 US 13162115 US13162115 US 13162115 US 201113162115 A US201113162115 A US 201113162115A US RE46701 E USRE46701 E US RE46701E
US13162115
More than one reissue application has been filed for the reissue of U.S. Pat. No. 7,548,680. The reissue applications are U.S. patent application Ser. Nos. 13/162,115 and 14/028,338. U.S. patent application Ser. No. 14/028,338 is a continuation reissue application of the present application, which is patent application Ser. No. 13/162,115.
The present application is a Continuation of U.S. Ser. No. 11/653,137 filed on Jan, 12, 2007 now U.S. Pat. No. 7,349,616 issued Mar. 25, 2008, which is incorporated herein by reference.
Still further embodiments provide related fiber optic hardware adapted for use in MDUs and other facilities. For example, the present invention provides fiber optic splice tray assemblies defining a density of splice holders per unit of volume of the splice tray assembly of at least 5 single splices/in3 and/or at least 10 mass fusion splices/in3, fiber optic splitter modules that includes a splitter axis orthogonal to an opening axis and/or that define a density of splits per unit volume of the housing of at least 5 splits/in3, fiber optic routing guides adapted to store an amount of length of optical fiber (900 μm diameter) per unit of volume of a housing of at least 10 in/in3, and fiber distribution terminals (“FDTs”) defining a density of fiber optic output receptacles per unit of volume of the housing of at least 10 receptacles/in3 for an input subscriber optical cable and of at least 6 receptacles/in3 for a connectorized input subscriber optical cable. All of these fiber optic hardware components provide a significant improvement to the comparable conventional components, thus allowing them to be inure easily handled and allowing them to be installed in a greater number of locations based upon the network's requirements and/or the technician's preferences. Therefore, the LCPs, cable assemblies, FDTs, and other components of various embodiments of the present invention provide for cost-effective, reduced-size, and easily-installed fiber optic networks for MDUs.
FIGS. 5A-5D illustrate yet another LCP 90 of the present invention, wherein the LCP includes a plurality of multi-fiber receptacles 92 adapted to received multi-fiber connectors (nut shown) of the subscriber optical fibers. The housing 94 of the LCP 90 defines an interior cavity 96 into which a plurality of splitter modules 98 may be received. Rather than providing a cable assembly as in the embodiments discussed above, the LCP 90 is adapted to house a plurality of splitter modules 98. The splitter modules 98 of the illustrated embodiments includes a single input opening 100 and a plurality of output openings 102 to which optical fibers may be routed and connected via multi-fiber connectors (not shown). The optical fibers pass through the openings 104 and 106 similar to the embodiments described above; however, it would be possible to change the routing if desired by the technician. The splitter modules 98 include a splitter (not shown) that splits the optical signal received through the input opening 100 to the plurality of receptacles of the output openings. The splitter modules 98 are installed by fastening them to brackets 108 provided in the interior cavity 96 of the housing 94; however, further embodiments may install the splitter modules in alternative fashions, such as by providing a splitter end of a cable assembly wherein the splitter end is adapted to receive at least one splitter module within the splitter end, to describe one non-limiting example. The LCP 90 of FIGS. 5A-5D includes an access cover 110 to limit access to the splitter modules to technicians. The splitter modules of certain embodiments of the present invention include the splitter modules of FIGS. 13A-13D described in more detail below.
Various embodiments of the present invention are adapted so to include bend performance optical fibers. One example of bend performance optical fiber is a microstructured optical fiber having 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 such that the optical fiber is capable of single mode transmission at one or more wavelengths in one or more operating wavelength ranges. The core region and cladding region provide improved bend resistance, and single mode operation at wavelengths preferably greater than or equal to 1500 nm, in some embodiments also greater than about 1310 nm, in other embodiments also greater than 1260 nm. The optical fibers provide a mode field at a wavelength of 1310 nm preferably greater than 8.0 microns, more preferably between about 8.0 and 10.0 microns. In preferred embodiments, optical fiber disclosed herein is thus single-mode transmission optical fiber.
In some embodiments present invention, the microstructured optical fibers disclosed herein comprises a core region disposed about a longitudinal centerline and a cladding region surrounding the core region, the cladding region comprising an annular hole-containing region comprised of non-periodically disposed holes, wherein the annular hole-containing region has a maximum radial width of less than 12 microns, the annular hole-containing region has a regional void area percent of less than about 30 percent, and the non-periodically disposed holes have a mean diameter of less than 1550 nm.
In one set of embodiments, the core region includes doped silica to provide a positive refractive index relative to pure silica, e.g. germania doped silica. The core region is preferably hole-free. In some embodiments, the core region comprises a single core segment having a positive maximum refractive index relative to pure silica Δ1 in %, and the single core segment extends from the centerline to a radius R1. In one set of embodiments, 0.30%<Δ1<0.40%, and 3.0 μm<R1<5.0 μm. In some embodiments, the single core segment has a refractive index profile with an alpha shape, where alpha is 6 or more, and in some embodiments alpha is 8 or more. In some embodiments, the inner annular hole-free region extends from the core region to a radius R2, wherein the inner annular hole-free region has a radial width W12, equal to R2-R1, and W12 is greater than 1 μm. Radius R2 is preferably greater than 5 μm, more preferably greater than 6 μm. The intermediate annular hole-containing region extends radially outward from R2 to radius R3 and has a radial width W23, equal to R3-R2. The outer annular region 186 extends radially outward from R3 to radius R4. Radius R4 is the outermost radius of the silica portion of the optical fiber. One or more coatings may be applied to the external surface of the silica portion of the optical fiber, starting at R4, the outermost diameter or outermost periphery of the glass part of the fiber. The core region and the cladding region are preferably comprised of silica. The core region is preferably silica doped with one or more dopants. Preferably, the core region is hole-free. The hole-containing region has an inner radius R2 which is not more than 20 μm. In sonic embodiments, R2 is not less than 10 μm and not greater than 20 μm. In other embodiments, R2 is not less than 10 μm and not greater than 18 μm. In other embodiments, R2 is not less than 10 μm and not greater than 14 μm. Again, while not being limited to any particular width, the hole-containing region has a radial width W23 which is not less than 0.5 μm. In some embodiments, W23 is not less than 0.5 μm and not greater than 20 μm. In other embodiments, W23 is not less than 2 μm and not greater than 12 μm. In other embodiments, W23 is not less than 2 μm and not greater than 10 μm.
2. A fiber optic splitter module according to claim 1, for optically connecting at least one input optical fiber and a plurality of output optical fibers, the splitter module comprising:
a housing having at least one opening therethrough, wherein the opening defines an opening axis orthogonal to the opening; and
a splitter within the housing, wherein the input optical fiber is optically connected to the plurality of output optical fibers by the splitter, wherein the splitter defines a splitter axis aligned with the input optical fiber and the plurality of output optical fibers;
wherein the splitter axis is orthogonal to the opening axis;
wherein the splitter module defines a density of output optical fiber splits per unit of volume of the housing of at least 5 splits/in3; and
wherein the input optical fiber and the plurality of output optical fibers are routed within the housing generally without a slack loop.
6. A fiber optic splitter module according to claim 1, for optically connecting at least one input optical fiber and a plurality of output optical fibers, the splitter module comprising:
7. A splitter module according to claim 6, wherein the microstructured fiber has an 8 mm macrobend induced loss at 1550 mm nm of less than 0.2 dB/turn.
8. A fiber optic splitter module according to claim 3, for optically connecting at least one input optical fiber and a plurality of output optical fibers, the splitter module comprising:
wherein the splitter module defines a density of output optical fiber splits per unit of volume of the housing from about 4 splits/in3 to about 10 splits/in3; and
9. A fiber optic splitter module according to claim 3, for optically connecting at least one input optical fiber and a plurality of output optical fibers, the splitter module comprising:
10. A splitter module according to claim 9, wherein the microstructured fiber has an 8 mm macrobend induced loss at 1550 mm nm of less than 0.2 dB/turn.
11. A fiber oprtic splitter module according to claim 4, for optically connecting at least one input optical fiber and a plurality of output optical fibers, the splitter module comprising:
wherein the splitter axis is orthogonal to the opening axis; and
wherein at least one optical fiber of the plurality of output optical fibers 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; and
12. The fiber optic splitter module of claim 2, wherein the splitter splits the optical signal carried by the input optical fiber into 8 optical signals.
13. The fiber optic splitter module of claim 2, wherein the splitter splits the optical signal carried by the input optical fiber into 16 optical signals.
14. The fiber optic splitter module of claim 2, wherein the splitter splits the optical signal carried by the input optical fiber into 32 optical signals.
15. The fiber optic splitter module of claim 2, wherein the splitter splits the optical signal carried by the input optical fiber into 64 optical signals.
16. The fiber optic splitter module of claim 2, wherein the housing has exterior dimensions of less than about 3.07 inches×4.85 inches×0.92 inches.
17. The fiber optic splitter module of claim 2, wherein at least one of the input optical fiber and the output optical fiber is a bend performance optical fiber.
18. The fiber optic splitter module of claim 2, wherein the plurality of output optical fibers comprise a plurality of pigtails each having a connectorized end.
19. The fiber optic splitter module of claim 18, wherein at least one of the plurality of pigtails optically connects to a subscriber optical fiber.
20. The fiber optic splitter module of claim 8, wherein the housing supports an optical signal split density of between about 5 splits/in3 and about 8 splits/in3 of volume.
21. The fiber optic splitter module of claim 8, wherein the housing supports an optical signal split density of between about 6 splits/in3 and about 7 splits/in3 of volume.
22. The fiber optic splitter module of claim 8, wherein the housing supports an optical signal split density of about 6.07 splits/in3 inch of volume.
23. The fiber optic splitter module of claim 8, wherein the splitter splits the optical signal carried by the input optical fiber into 8 optical signals.
24. The fiber optic splitter module of claim 8, wherein the splitter splits the optical signal carried by the input optical fiber into 16 optical signals.
25. The fiber optic splitter module of claim 8, wherein the splitter splits the optical signal carried by the input optical fiber into 32 optical signals.
26. The fiber optic splitter module of claim 8, wherein the splitter splits the optical signal carried by the input optical fiber into 64 optical signals.
27. The fiber optic splitter module of claim 8, wherein the housing has exterior dimensions of less than about 3.07 inches×4.85 inches×0.92 inches.
28. The fiber optic splitter module of claim 8, wherein at least one of the input optical fiber and the output optical fiber is a bend performance optical fiber.
29. The fiber optic splitter module of claim 8, wherein the plurality of output optical fibers comprise a plurality of pigtails each having a connectorized end.
30. The fiber optic splitter module of claim 29, wherein at least one of the plurality of pigtails optically connects to a subscriber optical fiber.
31. The fiber optic splitter module of claim 11, wherein the housing supports an optical signal split density of volume of the housing of at least 5 splits/in3 of volume.
32. The fiber optic splitter module of claim 11, wherein the housing supports an optical signal split density of between about 4 splits/in3 and about 10 splits/in3 of volume.
33. The fiber optic splitter module of claim 11, wherein the housing supports an optical signal split density of between about 5 splits/in3 and about 8 splits/in3 of volume.
34. The fiber optic splitter module of claim 11, wherein the housing supports an optical signal split density of between about 6 splits/in3 and about 7 splits/in3 of volume.
35. The fiber optic splitter module of claim 11, wherein the housing supports an optical signal split density of about 6.07 splits/in3 of volume.
36. The fiber optic splitter module of claim 11, wherein the splitter splits the optical signal carried by the input optical fiber into 8 optical signals.
37. The fiber optic splitter module of claim 11, wherein the splitter splits the optical signal carried by the input optical fiber into 16 optical signals.
38. The fiber optic splitter module of claim 11, wherein the splitter splits the optical signal carried by the input optical fiber into 32 optical signals.
39. The fiber optic splitter module of claim 11, wherein the splitter splits the optical signal carried by the input optical fiber into 64 optical signals.
40. The fiber optic splitter module of claim 11, wherein the housing has exterior dimensions of less than about 3.07 inches×4.85 inches×0.92 inches.
41. The fiber optic splitter module of claim 11, wherein at least one of the input optical fiber and the output optical fiber is a bend performance optical fiber.
42. The fiber optic splitter module of claim 11, wherein the plurality of output optical fibers comprise a plurality of pigtails each having a connectorized end.
43. The fiber optic splitter module of claim 42, wherein at least one of the plurality of pigtails optically connects to a subscriber optical fiber.
44. An optical splitter module comprising:
an optical splitter in the housing, wherein the optical splitter is configured to receive at least one input optical fiber carrying an optical signal and split the optical signal into a plurality of optical signals, wherein the housing supports an optical signal split density of between about 4 splits/in3 and about 10 splits/in3 of volume.
45. The optical splitter module of claim 44, wherein the housing supports an optical signal split density of between about 5 splits/in3 and about 8 splits/in3 of volume.
46. The optical splitter module of claim 44, wherein the housing supports an optical signal split density of between about 6 splits/in3 and about 7 splits/in3 of volume.
47. The optical splitter module of claim 44, wherein the housing supports an optical signal split density of about 6.07 splits/in3 inch of volume.
48. The optical splitter module of claim 44, wherein the optical splitter splits the optical signal carried by the input optical fiber into 8 optical signals.
49. The optical splitter module of claim 44, wherein the optical splitter splits the optical signal carried by the input optical fiber into 16 optical signals.
50. The optical splitter module of claim 44, wherein the optical splitter splits the optical signal carried by the input optical fiber into 32 optical signals.
51. The optical splitter module of claim 44, wherein the optical splitter splits the optical signal carried by the input optical fiber into 64 optical signals.
52. The optical splitter module of claim 44, wherein the housing has exterior dimensions of less than about 3.07 inches×4.85 inches×0.92 inches.
53. The optical splitter module of claim 44, wherein each of the plurality of optical signals is carried by a respective output optical fiber.
54. The optical splitter module of claim 44, wherein at least one of the input optical fiber and the output optical fiber is a bend performance optical fiber.
55. The optical splitter module of claim 44, wherein the plurality of output optical fibers comprise a plurality of pigtails each having a connectorized end.
56. The optical splitter module of claim 55, wherein at least one of the plurality of pigtails optically connects to a subscriber optical fiber.
57. An optical splitter module comprising:
an optical splitter in the housing, wherein the optical splitter is configured to receive at least one input optical fiber carrying an optical signal and split the optical signal into a plurality of optical signals, wherein the housing supports an optical signal split density of at least 5 splits/in3 of volume.
58. The optical splitter module of claim 57, wherein the optical splitter splits the optical signal carried by the input optical fiber into 8 optical signals.
59. The optical splitter module of claim 57, wherein the optical splitter splits the optical signal carried by the input optical fiber into 16 optical signals.
60. The optical splitter module of claim 57, wherein the optical splitter splits the optical signal carried by the input optical fiber into 32 optical signals.
61. The optical splitter module of claim 57, wherein the optical splitter splits the optical signal carried by the input optical fiber into 64 optical signals.
62. The optical splitter module of claim 57, wherein the housing has exterior dimensions of less than about 3.07 inches×4.85 inches×0.92 inches.
63. The optical splitter module of claim 57, wherein each of the plurality of optical signals is carried by a respective output optical fiber.
64. The optical splitter module of claim 63, wherein at least one of the input optical fiber and the output optical fiber is a bend performance optical fiber.
65. The optical splitter module of claim 63, wherein the plurality of output optical fibers comprise a plurality of pigtails each having a connectorized end.
66. The optical splitter module of claim 65, wherein at least one of the plurality of pigtails optically connects to a subscriber optical fiber.
67. An optical splitter module comprising:
an optical splitter in the housing, wherein the optical splitter is configured to receive at least one input optical fiber carrying an optical signal and split the optical signal into a plurality of optical signals, wherein the housing supports an optical signal split density of greater than about 2.34 splits/in3 of volume.
68. The optical splitter module of claim 67, wherein the housing has exterior dimensions of less than about 3.07 inches×4.85 inches×0.92 inches.
69. The fiber optic splitter module of claim 67, wherein the splitter splits the optical signal carried by the input optical fiber into 8 optical signals.
70. The fiber optic splitter module of claim 67, wherein the splitter splits the optical signal carried by the input optical fiber into 16 optical signals.
71. The fiber optic splitter module of claim 67, wherein the splitter splits the optical signal carried by the input optical fiber into 32 optical signals.
72. The fiber optic splitter module of claim 67, wherein the splitter splits the optical signal carried by the input optical fiber into 64 optical signals.
73. The fiber optic splitter module of claim 67, wherein the housing supports an optical split density of up to about 10 splits/in3 of volume.
74. An optical splitter module comprising:
a housing having a volume, wherein the housing has exterior dimensions of less than about 3.07 inches×4.85 inches×0.92 inches; and
an optical splitter in the housing, wherein the optical splitter is configured to optically connect at least one input optical fiber with a plurality of output optical fibers, and wherein the optical signal carried by the input optical fiber is split and carried by the plurality of output optical fibers.
75. The fiber optic splitter module of claim 74, wherein the induced loss is less than 0.5 dB/turn.
76. The fiber optic splitter module of claim 74, wherein the induced loss is less than 0.2 dB/turn.
77. The fiber optic splitter module of claim 74, wherein the induced loss is less than 0.05 dB/turn.
78. The fiber optic splitter module of claim 74, wherein the induced loss is less than 0.01 dB/turn.
79. The fiber optic splitter module of claim 74, wherein the housing supports an optical signal split density of volume of the housing of at least 5 splits/in3 of volume.
80. The fiber optic splitter module of claim 74, wherein the splitter splits the optical signal carried by the input optical fiber into 16 optical signals.
81. The fiber optic splitter module of claim 74, wherein the splitter splits the optical signal carried by the input optical fiber into 32 optical signals.
82. The fiber optic splitter module of claim 74, wherein the splitter splits the optical signal carried by the input optical fiber into 64 optical signals.
83. An optical splitter module comprising:
an optical splitter in the housing, wherein the optical splitter is configured to receive at least one input optical fiber carrying an optical signal and split the optical signal into a plurality of optical signals, each of the plurality of optical signals carried by a respective output optical fiber, wherein the plurality of output optical fibers comprise a plurality of pigtails each having a connectorized end and wherein the housing supports an optical signal split density of between about 4 splits/in3 and about 10 splits/in3 of volume.
84. Fiber optic local convergence point (“LCP”), wherein the LCP adapted for use with at least one input optical fiber and a plurality of output optical fibers, the LCP comprising:
an LCP housing comprising an interior cavity defined by a back wall and a plurality of sides and by the cover that is selectively moveable relative to the housing from an opened position to a closed position to thereby provide access to the interior cavity when the cover is in the opened position, wherein the LCP housing comprises at least one opening through the LCP housing for the passage of the at least one input optical fiber and the plurality of output optical fibers;
a splitter module according to claim 41 that optically connects the plurality of output fibers from said optical splitter with the plurality of receptacles.
85. An LCP according to claim 84, wherein the splitter module is joined to the interior surface of the cover.
86. An LCP according to claim 84, wherein the splitter module is joined to the interior surface of the cover with one or more fasteners.
87. An LCP according to claim 84, further comprising:
a splice tray assembly to splice the input optical fiber into a pig tail.
88. An LCP according to claim 84, further comprising:
routing guides to generally route splitter outputs about the perimeter of the interior cavity from the splitter module to the plurality of receptacles.
89. An LCP according to claim 84, further comprising:
an access cover joined to the LCP housing and generally positioned within the interior cavity of the LCP housing when the cover is in the closed position, wherein the access cover is selectively moveable relative to the housing from an opened position to a closed position to thereby provide access to the provider portion when the access cover is in the opened position and wherein the access cover defines an interior surface facing the back wall of the LCP housing when the access cover defines the closed position.
US13162115 2007-01-12 2011-06-16 Fiber optic local convergence points for multiple dwelling units Active USRE46701E1 (en)
US12012144 Reissue US7548680B2 (en) 2007-01-12 2008-01-31 Fiber optic local convergence points for multiple dwelling units
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