CA2569748A1 - Optical tube assembly having a dry insert and methods of making the same - Google Patents

Optical tube assembly having a dry insert and methods of making the same Download PDF

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Publication number
CA2569748A1
CA2569748A1 CA002569748A CA2569748A CA2569748A1 CA 2569748 A1 CA2569748 A1 CA 2569748A1 CA 002569748 A CA002569748 A CA 002569748A CA 2569748 A CA2569748 A CA 2569748A CA 2569748 A1 CA2569748 A1 CA 2569748A1
Authority
CA
Canada
Prior art keywords
tube assembly
optical
optical tube
water
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002569748A
Other languages
French (fr)
Other versions
CA2569748C (en
Inventor
Alan T. Parsons
Jody L. Greenwood
Kenneth D. Temple, Jr.
Jason C. Lail
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Corning Research and Development Corp
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2569748A1 publication Critical patent/CA2569748A1/en
Application granted granted Critical
Publication of CA2569748C publication Critical patent/CA2569748C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/443—Protective covering
    • G02B6/4432—Protective covering with fibre reinforcements
    • G02B6/4433—Double reinforcement laying in straight line with optical transmission element
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/14—Mode converters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4403—Optical cables with ribbon structure

Abstract

An optical tube assembly having at least one optical waveguide, at least one dry insert (14), and a tube. In one embodiment, the dry insert has a first layer and a second layer attached together with an adhesive. The dry insert also includes a plurality of particles having an average particle size of about 600 microns or less for inhibiting microbending. The first layer may be a polyurethane foam having an average cell size of about 1000 microns or less and the second layer is a water-swellable layer. The dry insert is disposed within the tube and generally surrounds the at least one optical waveguide and the tube asembly can be a portion of a fiber optic cable.

Claims (45)

1. An optical tube assembly comprising:
a tube;
at least one optical waveguide, the optical waveguide being disposed in the tube; and at least one dry insert, the at least one dry insert having a first layer and a second layer, the first layer being a foam layer and the second layer being a water-swellable layer, the first layer being attached to the second layer by an adhesive, the dry insert being disposed within the tube and generally surrounds the at least one optical waveguide, wherein the dry insert includes a plurality of particles having an average particle size of about 600 microns or less for inhibiting microbending.
2. The optical tube assembly of claim 1, the average particle size being about 450 microns or less.
3. The optical tube assembly of claim 1, the foam layer having an average cell size of about 1000 microns or less.
4. The optical tube assembly of claim 1, the foam layer having an average cell size of about 700 microns or less.
5. The optical tube assembly of claim 1, the polyurethane foam being an open cell ether-based polyurethane foam.
6. The optical tube assembly of claim 1, the water-swellable layer being a water-swellable tape.
7. The optical tube assembly of claim 6, the water-swellable tape having a first water-swellable component and a second water-swellable component.
8. The optical tube assembly of claim 1, the at least one optical waveguide having a normalized pull-out force between about 0.5 N/m and about 5.0 N/m.
9. The optical tube assembly of claim 1, the at least one optical waveguide having a normalized pull-out force between about 1 N/m and about 4 N/m.
10. The optical tube assembly of claim 1, the at least one optical waveguide being a portion of a ribbon, the ribbon having a normalized ribbon pull-out force between about 0.5 N/m and about 5.0 N/m.
11. The optical tube assembly of claim 1, the at least one optical waveguide being a portion of a ribbon, the ribbon having a normalized pull-out force between about 1 N/m and about 4 N/m.
12. The optical tube assembly of claim 1, the at least one dry insert having an uncompressed height h of about 5 mm or less.
13. The optical tube assembly of claim 1, the optical tube assembly being a portion of a fiber optic cable.
14. The optical tube assembly of claim 13, the fiber optic cable having a normalized ribbon coupling force between about 0.5 N/m and about 5 N/m.
15. The optical tube assembly of claim 1, the optical tube assembly being a portion of a fiber optic cable, the fiber optic cable having an armor tape.
16. The optical tube assembly of claim 1, the optical tube assembly having a water-swell ratio of about three or more.
17. An optical tube assembly comprising:
a tube, the tube having an interior surface;
at least one optical waveguide, the at least one optical waveguide being disposed within the tube and having a positive excess length compared with the tube; and at least one dry insert, the at least one dry insert having at least two laminated layers that are attached together with an adhesive, the at least one dry insert generally surrounding the at least one optical waveguide, thereby forming a core that is disposed within the tube, the at least one dry insert acts to couple the at least one optical waveguide to the interior surface of the tube so that the at least one optical waveguide has a normalized pull-out force between about 0.5 N/m and about 5.0 N/m while cushioning the at least one optical waveguide, thereby maintaining an optical attenuation below about 0.4 dB/km.
18. The optical tube assembly of claim 17, the adhesive having a particle size of about 600 microns or less.
19. The optical tube assembly of claim 17, at least one of the two laminated layers being a foam layer having an average cell size of about 1000 microns or less.
20. The optical tube assembly of claim 17, at least one of the two laminated layers being a foam layer having an average cell size of about 700 microns or less.
21. The optical tube assembly of claim 17, the two laminated layers comprising a compressible layer and at least one water-swellable layer.
22. The optical tube assembly of claim 17, one of the two laminated layers comprising an open cell ether-based polyurethane foam.
23. The optical tube assembly of claim 17, one of the two laminated layers being a water-swellable tape.
24. The optical tube assembly of claim 17, one of the two laminated layers being a water-swellable layer having a first water-swellable component and a second water-swellable component.
25. The optical tube assembly of claim 17, the at least one optical waveguide having a normalized pull-out force between about 1 N/m and about 4 N/m.
26. The optical tube assembly of claim 17, the at least one optical waveguide being a portion of a ribbon, the ribbon having a normalized pull-out force between about 0.5 N/m and about 5.0 N/m.
27. The optical tube assembly of claim 17, the at least one optical waveguide being a portion of a ribbon, the ribbon having a normalized pull-out force between about 1 N/m and about 4 N/m.
28. The optical tube assembly of claim 17, the at least one dry insert having an uncompressed height of about 5 mm or less.
29. The optical tube assembly of claim 17, the optical tube assembly being a portion of a fiber optic cable.
30. The optical tube assembly of claim 29, the fiber optic cable having a normalized ribbon coupling force between about 0.5 N/m and about 5 N/m.
31. The optical tube assembly of claim 17, the optical tube assembly being a portion of a fiber optic cable, the fiber optic cable having an armor tape.
32. The optical tube assembly of claim 17, the optical tube assembly having a water-swell ratio of about three or more.
33. An optical tube assembly comprising:
a tube;
at least one optical waveguide; and at least one dry insert, the at least one dry insert having a polyurethane foam layer having an average cell size of about 1000 microns or less, wherein the at least one dry insert and the at least one optical waveguide form a core disposed within the tube, wherein the at least one optical waveguide has a normalized pull-out force between about 0.5 N/m and about 5.0 N/m.
34. The optical tube assembly of claim 33, the at least one dry insert having a plurality of particle having an average particle size of about 600 microns or less.
35. The optical tube assembly of claim 33, the polyurethane foam layer having an average cell size of about 700 microns or less.
36. The optical tube assembly of claim 33, the normalized pull-out force between about 1 N/m and about 4 N/m.
37. The optical tube assembly of claim 33, the at least one optical waveguide being a portion of a ribbon having a normalized pull-out force between about 1 N/m and about 4 N/m.
38. The optical tube assembly of claim 33, the at least one dry insert comprising an open cell ether-based polyurethane foam layer and at least one water-swellable layer.
39. The optical tube assembly of claim 38, the water-swellable layer being a water-swellable tape.
40. The optical tube assembly of claim 33, the dry insert further comprising a water-swellable layer having a first water-swellable component and a second water-swellable component.
41. The optical tube assembly of claim 33, the at least one dry insert having an uncompressed height of about 5 mm or less.
42. The optical tube assembly of claim 33, the optical tube assembly being a portion of a fiber optic cable.
43. The optical tube assembly of claim 42, the fiber optic cable having a normalized ribbon coupling force between about 0.5 N/m and about 5 N/m.
44. The optical tube assembly of claim 33, the optical tube assembly being a portion of a fiber optic cable, the fiber optic cable having an armor tape.
45. The optical tube assembly of claim 33, the optical tube assembly having a water-swell ratio of about three or more.
CA2569748A 2004-06-07 2004-07-09 Optical tube assembly having a dry insert and methods of making the same Expired - Fee Related CA2569748C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/862,541 US7177507B2 (en) 2002-12-19 2004-06-07 Optical tube assembly having a dry insert and methods of making the same
US10/862,541 2004-06-07
PCT/US2004/022270 WO2005121857A1 (en) 2004-06-07 2004-07-09 Optical tube assembly having a dry insert

Publications (2)

Publication Number Publication Date
CA2569748A1 true CA2569748A1 (en) 2005-12-22
CA2569748C CA2569748C (en) 2012-08-28

Family

ID=35503221

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2569748A Expired - Fee Related CA2569748C (en) 2004-06-07 2004-07-09 Optical tube assembly having a dry insert and methods of making the same

Country Status (6)

Country Link
US (1) US7177507B2 (en)
JP (1) JP4948408B2 (en)
CN (1) CN100472262C (en)
CA (1) CA2569748C (en)
DE (1) DE112004002891B4 (en)
WO (1) WO2005121857A1 (en)

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Also Published As

Publication number Publication date
CN100472262C (en) 2009-03-25
JP2008502025A (en) 2008-01-24
JP4948408B2 (en) 2012-06-06
CN101010610A (en) 2007-08-01
DE112004002891T5 (en) 2007-08-23
US20040223707A1 (en) 2004-11-11
WO2005121857A1 (en) 2005-12-22
US7177507B2 (en) 2007-02-13
CA2569748C (en) 2012-08-28
DE112004002891B4 (en) 2017-05-18

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