GB2325752A - Optical fibre cable - Google Patents

Optical fibre cable Download PDF

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Publication number
GB2325752A
GB2325752A GB9809580A GB9809580A GB2325752A GB 2325752 A GB2325752 A GB 2325752A GB 9809580 A GB9809580 A GB 9809580A GB 9809580 A GB9809580 A GB 9809580A GB 2325752 A GB2325752 A GB 2325752A
Authority
GB
United Kingdom
Prior art keywords
optical fibre
tensional
yarn
fibre cable
cable according
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.)
Withdrawn
Application number
GB9809580A
Other versions
GB9809580D0 (en
Inventor
Joong-Jin Hwang
Byung-Woo Kim
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.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
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 Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of GB9809580D0 publication Critical patent/GB9809580D0/en
Publication of GB2325752A publication Critical patent/GB2325752A/en
Withdrawn legal-status Critical Current

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
    • G02B6/441—Optical cables built up from sub-bundles
    • 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
    • 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
    • G02B6/4434—Central member to take up tensile loads
    • 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
    • G02B6/4479—Manufacturing methods of optical cables
    • G02B6/4482—Code or colour marking

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Communication Cables (AREA)

Abstract

An optical fibre cable comprises a cylindrical housing 30, a central structural support member 16 and at least one optical fibre tube 14. The optical fibre tube 14 contains at least one optical fibre 10. A single layer of solid-state, water-resistant material 50 is applied to the surface of the structural support member 16 and to the surface of the optical fibre tube(s) 14 for protecting the optical fibre(s) 10 from moisture penetration. Intervening tubes 20 and tensional yarn 52 are shown. The yam may be in two layers and be coated with adhesive polymer. The optical fibres may be coated with coloured acrylic for identification.

Description

1 OPTICAL FIBRE CABLE
BACKGROUND TO THE INVENTION
2325752 The present invention relates to an optical fibre cable and a method of constructing an optical fibre cable.
FIG. 1 illustrates a conventional optical fibre cable. The conventional optical fibre cable comprises a plurality of loose tubes 14, each containing at least one optical fibre 10. The loose tubes 14 are arranged around a central strength member 16, which is positioned at the centre of the optical fibre cable. Each of the loose tubes 14 is filled with a jelly 12 to prevent the optical fibres 10 from being damaged by moisture penetration. Intervening tubes 20, devoid of optical fibres 10, may also be positioned around the central strength member 16. The intervening tubes 20 are provided to help retain the loose tubes 14 in a concentric arrangement around the central strength member 16.
The gaps between the loose tubes 14 and the intervening tubes 20 are filled with a material 18. The material 18 also fills the gaps between the loose tubes 14 and the central strength member 16 and those between the central strength member 16 and the intervening tubes 20. The material 18, which is a jelly-like material, prevents external moisture penetration.
A film 22 is wrapped around the outer surfaces of the loose tubes 14 and the intervening tubes 20 to isolate the filling material 18 from the external environment. An additional fibre 24 may be wrapped around the film 22. An inner coating 26 is also applied to the outer surface of the film 22 to protect the optical fibres 10 from the outside environment. In addition to protecting the optical fibres 10, the inner coating 26 provides the optical fibre cable with & predetermined required compression strength. The inner coating 26 includes a cylindrical void 26a, as 2 shown in FIG. 2, f or retaining the loose tubes 14, the intervening tubes 20, and the central strength member 16.
A tensional yarn 28 is wound around the outer surface of 5 the inner coating 26 to provide the optical fibre cable with a required tensile strength. Typically, the tensional yarn 28 is wound around the inner coating 26 so that multiple layers of the tensional yarn 28 are formed. An additional binder fibre, tape, or film, is wrapped around the outermost tensional yarn layer so that the pieces of tensional yarn 28 in the layers are pressed against each other tightly. An outer coating 30 is applied to the outer surface of the tensional yarn 28 to protect the interior components of the cable. The outer coating 30 is formed of a material suitable for the installation environment of the optical fibre cable.
The conventional optical fibre cable described above suffers from a number of drawbacks. Use of the jelly-like filling material 18 and the additional film 22 and fibre 24 to prevent moisture penetration increases the outer diameter and cost of the optical fibre cable. Additionally, the inner coating, which is annular as shown in FIG. 2, must be thick to ensure that the optical fibre cable is provided with the predetermined required compression strength. This also increases the outer diameter and weight of the optical fibre cable.
Moreover, use of an additional binder fibre, film, or tape 30 to press the pieces of tensional yarn 28 together gives rise to further problems. Use of a f ilm increases the production cost of a long cable. Use of the binder fibre lowers a linear velocity because the application pitch of the binder fibre should be smaller than that of the tensional fibre. As a result, application and extrusion of the tensional yarn must be performed separately.
SUMMARY OF THE INVENTION
It is therefore an objective of the present invention to 3 overcome the problems described above.
Accordingly, the present invention provides an optical fibre cable comprising: 5 a cylindrical housing; a structural support member positioned substantially at the centre of the cylindrical housing; at least one optical fibre tube positioned around the structural support member, the optical f ibre tube including at least one optical fibre and being filled with material adapted to protect optical fibres from moisture penetration; and a single layer of solid-state, water-resistant material applied to the surface of the structural support member and to the surfaces of all the optical fibre tubes so that any voids within the housing are filled, for protecting the optical fibres from moisture penetration.
Use of a single layer of solid-state, water resistant 20 material prevents water penetrating into the optical fibre tubes without unnecessarily increasing the diameter and weight of the optical fibre cable. The solid-state, water resistant material advantageously also increases the compression strength of the cable. Use of a single layer of solid-state, water resistant material, moreover, reduces the production costs of the optical fibre cable.
Preferably, the optical fibre cable further comprises a tensional yarn wound around the outer surface of the layer of solid-state, water-resistant material for providing the optical fibre cable with tensile strength.
Such an optical fibre cable has the additional advantage of increased tensile strength.
To increase the tensile strength of the cable, it is preferred that two layers of tensional yarn are formed around the outer surface of the solidstate, waterresistant material.
4 To prevent generation of a rotational force, a first layer of tensional yarn is formed by winding the tensional yarn around the solid-state, water-resistant material in a first direction and a second layer is formed by winding the tensional yarn around the solid-state, water- resistant material in an opposite direction.
Preferably, the tensional yarn is coated with a polymer to keep the tensional yarn wound tightly around the solid- state, water-resistant material and to prevent moisture from penetrating the tensional yarn.
The polymer may be one which becomes adhesive when subjected to heat treatment.
Preferably, the tensional yarn comprises a fibre or tape having a high tensile modulus and high strength. In particular, the tensional yarn may comprise aramid fibre or glass-based fibre.
To reduce the weight of the cable and increase its lifetime, the optical fibre tubes are preferably formed of plastic.
Preferably, at least one empty tube is also positioned around the structural support member, for retaining the optical fibre tubes in a predetermined arrangement around the structural support member.
Preferably, the predetermined arrangement is a concentric arrangement.
The optical fibre tubes may be filled with water-resistant jelly.
It is preferred that the solid-state, water-resistant material is applied by extrusion to the structural support member and optical fibre tubes, to ensure that it is evenly applied.
The solid-state, water-resistant material, preferably, comprises polyethylene or vinyl chloride resin.
The present invention also extends to an optical f ibre 5 cable comprising:
cylindrical housing; plurality of optical fibre tubes positioned in the housing, each optical fibre tube containing at least one optical fibre; and a layer of tensional yarn surrounding the optical fibre tubes, the tensional yarn being coated with polymer so that the pieces of the tensional yarn in the layer adhere to each other.
The polymer preferably comprises a polymer which becomes adhesive when subjected to heat treatment.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will now be described by way of example with reference to the accompanying drawings in which:
FIG. 1 is a sectional view of a conventional nonmetal, self-supporting optical fibre cable; FIG. 2 is a sectional view of an inner coating for protecting loose tubes in the conventional non-metal, self - supporting optical fibre cable; FIG. 3 is a sectional view of a non-metal, self supporting optical fibre cable according to a preferred embodiment of the present invention; 30 FIG. 4 is a cut perspective view of an inner coating for prot ecting loose tubes in the non-metal, selfsupporting optical fibre cable according to the preferred embodiment of the present invention; and FIG. 5 is a sectional view of the inner coating for protecting the loose tubes according to the preferred embodiment of the present invention.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
FIG. 3 illustrates an optical fibre cable 100 according to 6 the invention. The optical fibre cable 100 includes a central strength member 16. The central strength member 16 is positioned at the centre of the optical fibre cable 100. It provides the optical fibre cable 100 with tensile strength, which is necessary for installation of the cable. It also acts as a base around which loose tubes 14 and intervening tubes 20 are centred. The central strength member 16 is formed of a water-proof material to prevent moisture from penetrating into gaps between the loose tubes 14 and the central strength member 16.
As mentioned above, an optical fibre cable 100 according to the invention also includes a plurality of loose tubes 14. As illustrated in FIG. 3, the loose tubes 14 are positioned around the central strength member 16. The loose tubes 14 are formed of highly strong plastic. Each loose tube 14 contains at least one optical fibre 10. The optical fibres 10 are preferably coated with coloured acrylic, for ease of identification. The loose tubes 14 are filled with a jelly 12 to prevent the optical fibres 10 from being damaged by moisture penetration.
An optical fibre cable 100 according to the invention may also include intervening tubes 20. The intervening tubes 20 are provided to keep the loose tubes 14 in a concentric arrangement around the central strength member 16. The intervening tubes 20 are also positioned around the central strength member 16.
An inner coating 50 is applied to the outer surfaces of the loose tubes 14 and the intervening tubes 20. The inner coating 50 fills the gaps between the loose tubes 14 and the central strength member 16, as well as the gaps between the loose tubes 14 and the intervening tubes 20. The inner coating 50 protects the optical fibres 10 from the external environment. It also provides a surface around which a tensional yarn 52 may be wound. The inner coating 50 is preferably formed of polyethylene or vinyl chloride resin. As shown in FIGs. 4 and 5, the inner coating 50 is 7 introduced evenly into the gaps between the loose tubes 14. This increases compression characteristics and decreases its application thickness.
In a preferred embodiment, at least one tensional yarn 52 is wound around the outer surface of the inner coating 50. The tensional yarn 52 provides the optical fibre cable 100 with a required tensile strength. The tensional yarn 52 is -preferably wound so that two layers of tensional yarn are 10 formed on the inner coating 50. In particular, it is preferred that a first layer be formed by winding the tensional yarn 52 around the inner coating 50 in a first direction and that the second layer be formed by winding the tensional yarn 52 around the inner coating 50 in an opposite direction. Such winding prevents generation of a rotational force.
To keep the pieces of the tensional yarn 52 in each layer pressed against each other, the tensional yarn.52 is thermally treated and coated with an adhesive polymer material. Specifically, the tensional yarn 52 is fabricated by applying a high back- tension to a tensional fibre, pre-stretching the tensional fibre, coating the prestretched fibre with the adhesive polymer material and then subjecting the coated fibre to heat treatment. These steps prevent further expansion of the tensional yarn 52. The tensional yarn 52 preferably comprises a fibre or a tape having a high strength and a high tensile modulus. For example, aramid or glass-based fibre formed of filaments would be suitable.
In an alternative embodiment, the tensional yarn 52 is not coated with the polymer material. Instead, water-proof material is added to the tensional yarn 52 to prevent possible moisture penetration.
An outer coating 30 is applied to the tensional yarn 52 to protect various interior components of the cable. The outer coating 30 is formed of a material suitable for the 8 installation environment of the optical fibre cable 100.
Thus, the present invention provides an optical fibre cable which has enhanced compression characteristics and a smaller outer diameter. The present invention also provides an optical fibre cable which is lighter and cheaper to fabricate than conventional optical fibres. These advantages are achieved by using an inner coating of resin to f ill the gaps between the loose tubes, intervening tubes, and central strength member and to prevent moisture from penetrating into the loose tubes. The resin inner coating obviates the use of special equipment for applying the conventional jelly-like material used to prevent moisture penetration. It also eliminates the need for a film or a fibre which surrounds the filling material and the binder fibre or tape which is wrapped around the film or fibre. Accordingly, the present invention reduces the number of raw materials used and increases process efficiency and productivity. Heat treatment of and application of an adhesive polymer to the tensional yarn also provides advanages. Such treatment keeps the tensional yarn wound tightly around the inner coating without increasing the diameter of the optical fibre cable 100.
9

Claims (18)

  1. An optical fibre cable comprising:
    cylindrical housing; structural support member positioned substantially at the centre of the cylindrical housing; at least one optical fibre tube positioned around the structural support member, the optical fibre tube including at least one optical fibre and being filled with material adapted to protect optical fibres from moisture penetration; and a single layer of solid-state, water-resistant material applied to the surface of the structural support member and to the surfaces of all the optical fibre tubes so that any voids within the housing are filled, for protecting the optical fibres from moisture penetration.
  2. 2. An optical fibre cable according to claim 1 further comprising a tensional yarn wound around the outer surface of the layer of solid-state, water-resistant material for providing the optical fibre cable with tensile strength.
  3. 3. An optical fibre cable according to claim 2 in which two layers of tensional yarn are formed around the outer surface of the solid-state, waterresistant material.
  4. 4. An optical fibre cable according to claim 3 in which a first layer of tensional yarn is formed by winding the tensional yarn around the solidstate, water-resistant material in a first direction and a second layer is formed by winding the tensional yarn around the solid-state, waterresistant material in the opposite direction.
  5. 5. An optical fibre cable according to any one of claims 2-4 in which the tensional yarn is coated with a polymer, which protects the tensional yarn from moisture penetration and keeps the tensional yarn wound tightly around the solid-state, water-resistant material.
  6. 6. An optical fibre cable according to any one of claims 2-5 in which the tensional yarn is coated with a polymer which becomes adhesive when subjected to heat treatment.
  7. 7. An optical fibre cable according to any one of claims 2-6 in which the tensional yarn comprises a fibre or tape having a high tensile modulus and high strength.
  8. 8. An optical fibre cable according to any one of claims 2-7 in which the tensional yarn comprises aramid fibre or glass-based fibre.
  9. 9. An optical fibre cable according to any preceding claim in which the optical fibre tubes are formed of plastic.
    1
  10. 10. An optical fibre cable according to any preceding claim further comprising at least one empty tube positioned around the structural support member, for retaining the optical fibre tubes in a predetermined arrangement around the structural support member.
  11. 11. An optical fibre cable according to claim 10 in which the predetermined arrangement is a concentric arrangement.
  12. 12. An optical fibre cable according to any preceding claim in which the optical fibre tubes are filled with water-resistant jelly.
  13. 13. An optical fibre cable according to any preceding claim in which the solid-state, water-resistant material is applie-d by extrusion.
  14. 14. An optical fibre cable according to any receding claim in which the solid-state, water-resistant material comprises polyethylene or vinyl chloride resin.
  15. 15. An optical fibre cable comprising: a cylindrical housing; 11 a plurality of optical fibre tubes positioned in the housing, each optical f ibre tube containing at least one optical fibre; and layer of tensional yarn surrounding the optical 5 fibre tubes, the tensional yarn being so coated with polymer that the pieces of the tensional yarn in the layer adhe 'e to each other.
  16. 16. An optical fibre cable according to claim 15 in which the polymer comprises a polymer which becomes adhesive when subjected to heat treatment.
  17. 17. An optical f ibre cable according to any preceding claim in which the cylindrical housing forms the outermost portion of the optical fibre cable.
  18. 18. An optical fibre cable substantially as described herein with reference to and/or as illustrated in FIGs. 3-5 of the accompanying drawings.
    1
GB9809580A 1997-05-27 1998-05-06 Optical fibre cable Withdrawn GB2325752A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019970020932A KR100277032B1 (en) 1997-05-27 1997-05-27 Cable for optical fiber

Publications (2)

Publication Number Publication Date
GB9809580D0 GB9809580D0 (en) 1998-07-01
GB2325752A true GB2325752A (en) 1998-12-02

Family

ID=19507276

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9809580A Withdrawn GB2325752A (en) 1997-05-27 1998-05-06 Optical fibre cable

Country Status (6)

Country Link
JP (1) JPH10333001A (en)
KR (1) KR100277032B1 (en)
CN (1) CN1201914A (en)
DE (1) DE19823486A1 (en)
FR (1) FR2764079A1 (en)
GB (1) GB2325752A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20101145A1 (en) * 2010-06-24 2011-12-25 Brugg Ag Kabelwerke COMPOSITE CABLE ACTING AS AN INFRASTRUCTURE FOR TELECOMMUNICATIONS FOR USE IN SEVERE AND NON-CONVENTIONAL ENVIRONMENTS.
US20150129751A1 (en) * 2013-11-12 2015-05-14 Baker Hughes Incorporated Distributed sensing system employing a film adhesive

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Publication number Priority date Publication date Assignee Title
DE20210216U1 (en) * 2002-02-09 2003-03-20 Ccs Technology Inc Optical fiber cable, comprises outer cover and additionally incorporates concentric inner cover which surrounds bundles of optical fibers, takes up tensile loads and functions as support
KR100490136B1 (en) 2003-02-19 2005-05-17 엘에스전선 주식회사 All-Dielectric, Self-Supporting, Loose-Tube Optical Fiber Cable
KR100492957B1 (en) * 2003-02-25 2005-06-02 엘에스전선 주식회사 Loose Tube Optical Cable
US7570855B2 (en) * 2006-02-03 2009-08-04 Schott Corporation Conduit bundles including first-type and second-type conduits with disparate properties
CN100420971C (en) * 2006-06-14 2008-09-24 浙江富春江通信集团有限公司 Buried full medium optical cable
KR100872229B1 (en) * 2006-12-06 2008-12-05 엘에스전선 주식회사 Loose tube type optical cable improved in central member structure
DE102006059422A1 (en) * 2006-12-15 2008-06-19 CCS Technology, Inc., Wilmington Optical cable with transverse compressive strength
US20090226177A1 (en) * 2007-01-26 2009-09-10 Woosnam Calvin H Communications Cable and Method of Making Same
US20090087154A1 (en) * 2007-09-28 2009-04-02 Bradley Kelvin B Optical fiber cables
US20090087148A1 (en) * 2007-09-28 2009-04-02 Bradley Kelvin B Optical fiber cables
KR101270552B1 (en) * 2012-12-26 2013-06-03 케이유피피(주) Optical fiber cable protection tube and optical fiber cable protection pipe
US9075212B2 (en) * 2013-09-24 2015-07-07 Corning Optical Communications LLC Stretchable fiber optic cable

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GB2193583A (en) * 1986-08-07 1988-02-10 Telephone Cables Ltd Optical cables
EP0422573A2 (en) * 1989-10-09 1991-04-17 Sumitomo Electric Industries, Ltd. Waterproof optical fiber cable
US5157752A (en) * 1991-10-24 1992-10-20 Northern Telecom Limited Optical fiber cable with intermingled water blocking means and method of making same
US5229851A (en) * 1992-04-02 1993-07-20 Pirelli Cable Corporation Optical fiber cable with large number of ribbon units containing optical fibers and enclosed in tubes
US5230034A (en) * 1991-09-20 1993-07-20 Bottoms Jack Jr All dielectric self-supporting fiber optic cable
US5247599A (en) * 1992-06-05 1993-09-21 Sumitomo Electric Fiber Optics Corp. Steam resistant optical fiber cable
US5283014A (en) * 1991-06-21 1994-02-01 Siemens Aktiengesellschaft Method and apparatus for manufacturing an optical cable
US5325457A (en) * 1991-09-20 1994-06-28 Bottoms Jack Jr Field protected self-supporting fiber optic cable
US5335302A (en) * 1992-09-21 1994-08-02 Siemens Aktiengesellschaft Light waveguide lead having a filling compound and method for manufacture of the lead
US5355427A (en) * 1993-01-21 1994-10-11 Belden Wire & Cable Company Gas blocked fiber optic transmission
US5390273A (en) * 1992-04-02 1995-02-14 Pirelli Cable Corporation Flame resistant optical fiber cable with optical fibers loosely enclosed in tubes

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JPS5969702A (en) * 1982-10-14 1984-04-20 Nippon Telegr & Teleph Corp <Ntt> Optical fiber unit for optical cable
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FR2757643B1 (en) * 1996-12-23 1999-01-22 Alsthom Cge Alcatel FIBER OPTICAL, FLEXIBLE AND HIGH RESISTANCE CABLE

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4720164A (en) * 1984-07-05 1988-01-19 Siemens Aktiengesellschaft Pressure-tight optical cable
GB2193583A (en) * 1986-08-07 1988-02-10 Telephone Cables Ltd Optical cables
EP0422573A2 (en) * 1989-10-09 1991-04-17 Sumitomo Electric Industries, Ltd. Waterproof optical fiber cable
US5283014A (en) * 1991-06-21 1994-02-01 Siemens Aktiengesellschaft Method and apparatus for manufacturing an optical cable
US5230034A (en) * 1991-09-20 1993-07-20 Bottoms Jack Jr All dielectric self-supporting fiber optic cable
US5325457A (en) * 1991-09-20 1994-06-28 Bottoms Jack Jr Field protected self-supporting fiber optic cable
US5157752A (en) * 1991-10-24 1992-10-20 Northern Telecom Limited Optical fiber cable with intermingled water blocking means and method of making same
US5229851A (en) * 1992-04-02 1993-07-20 Pirelli Cable Corporation Optical fiber cable with large number of ribbon units containing optical fibers and enclosed in tubes
US5390273A (en) * 1992-04-02 1995-02-14 Pirelli Cable Corporation Flame resistant optical fiber cable with optical fibers loosely enclosed in tubes
US5247599A (en) * 1992-06-05 1993-09-21 Sumitomo Electric Fiber Optics Corp. Steam resistant optical fiber cable
US5335302A (en) * 1992-09-21 1994-08-02 Siemens Aktiengesellschaft Light waveguide lead having a filling compound and method for manufacture of the lead
US5355427A (en) * 1993-01-21 1994-10-11 Belden Wire & Cable Company Gas blocked fiber optic transmission

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20101145A1 (en) * 2010-06-24 2011-12-25 Brugg Ag Kabelwerke COMPOSITE CABLE ACTING AS AN INFRASTRUCTURE FOR TELECOMMUNICATIONS FOR USE IN SEVERE AND NON-CONVENTIONAL ENVIRONMENTS.
EP2402806A1 (en) * 2010-06-24 2012-01-04 Provincia di Milano Optical fiber composite cable adapted to operate as a telecommunication infrastructure for use in severe and non conventional environments
US20150129751A1 (en) * 2013-11-12 2015-05-14 Baker Hughes Incorporated Distributed sensing system employing a film adhesive
US10668706B2 (en) 2013-11-12 2020-06-02 Baker Hughes, A Ge Company, Llc Distributed sensing system employing a film adhesive

Also Published As

Publication number Publication date
KR100277032B1 (en) 2001-01-15
JPH10333001A (en) 1998-12-18
KR19980084993A (en) 1998-12-05
DE19823486A1 (en) 1998-12-10
CN1201914A (en) 1998-12-16
GB9809580D0 (en) 1998-07-01
FR2764079A1 (en) 1998-12-04

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