US20020006254A1 - Method for producing a coupler based on fiber-fused connection - Google Patents

Method for producing a coupler based on fiber-fused connection Download PDF

Info

Publication number
US20020006254A1
US20020006254A1 US09/821,767 US82176701A US2002006254A1 US 20020006254 A1 US20020006254 A1 US 20020006254A1 US 82176701 A US82176701 A US 82176701A US 2002006254 A1 US2002006254 A1 US 2002006254A1
Authority
US
United States
Prior art keywords
optical fiber
jacket
limbs
fusion
fiber core
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
US09/821,767
Other versions
US6431767B2 (en
Inventor
Hironobu Nagasaki
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.)
Nissho Musen Co Ltd
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 US20020006254A1 publication Critical patent/US20020006254A1/en
Application granted granted Critical
Publication of US6431767B2 publication Critical patent/US6431767B2/en
Assigned to NISSHO MUSEN CO., LTD reassignment NISSHO MUSEN CO., LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NAGASAKI, HIRONOBU
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

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
    • G02B6/24—Coupling light guides
    • G02B6/255—Splicing of light guides, e.g. by fusion or bonding
    • G02B6/2558—Reinforcement of splice joint
    • 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
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • G02B6/2821—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using lateral coupling between contiguous fibres to split or combine optical signals
    • G02B6/2835—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using lateral coupling between contiguous fibres to split or combine optical signals formed or shaped by thermal treatment, e.g. couplers

Definitions

  • the present invention relates to a method for producing a coupler based on fiber-fused connection.
  • optical separators and couplers are more frequently used than before for distributing light signals to multiple terminals and for transmitting signals in the reverse direction.
  • the conventional optical separator/coupler mainly incorporates a coupler (star coupler) having multiple input terminals to serve as a key element of an optical data bas network.
  • a coupler star coupler
  • This communication network enables a signal transmitted from any one terminal connected to the coupler to be distributed to the other terminals, its application becomes increasingly widened.
  • the coupler as described above is conventionally fabricated as follows. As shown in FIGS. 7 and 8, two optical fiber core lines (a) and (b) are closely placed together to bring their clads at the middle of their lengths in contact with each other; the contacted clads are heated to melt to form a fusion-connected section (c); jackets (d 1 ), (d 2 ), (d 3 ) and (d 4 ) are placed over the both limbs of each of optical fiber core lines (a) and (b) being moved from their ends (a 1 ), (b 1 ), (a 2 ) and (b 2 ), respectively; the fusion-connected section (c) together with the four ends of jacket limbs close to it are placed in a protective case (e); a hardening resin (f) such as an epoxy resin is introduced into the cavity within the protective case (e) to fill the cavity; and, when the resin is hardened, a coupler integral with the optical fiber core lines is obtained.
  • a hardening resin such as an epoxy resin
  • Resilient fibers inserted longitudinally beneath the jackets (d 1 ), (d 2 ), (d 3 ) and (d 4 ) and over the periphery of optical fiber core lines (a) and (b) are represented by (g) in the figures.
  • This invention was derived from an attempt to meet the above problems inherent to the conventional technique, and aims at providing a method for fabricating a fusion-connected coupler which enables simple, rapid production of a small, robust and inexpensive coupler in a highly productive manner.
  • the method for fabricating a coupler consists of placing a plurality of optical fiber cords in parallel each of which comprises an optical fiber core line covered with a jacket with resilient fibers disposed longitudinally around the periphery of the core line beneath the jacket; a cut is made on a specified point on the jacket of each optical fiber core line to divide the jacket into two limbs, and the divided limbs of each jacket are slid in opposite directions to expose thereby the middle section of the underlying optical fiber core line; the exposed sections of optical core lines are brought into contact with each other; the contacted sections are heated to melt to form thereby a fusion-connected section; each jacket limb displaced outward is slid back close to the fusion-connected section; the fusion-connected section together with the cut ends of jacket limbs close to it are placed in a protective case; a hardening resin such as an epoxy resin is introduced into the cavity within the protective case to fill the cavity; and, when the resin is hardened, the involved
  • FIG. 1 illustrates the first step of the processes for producing a fusion-connected coupler according to the method of this invention.
  • FIG. 2 illustrates the second step of the same production processes.
  • FIG. 3 illustrates the third step of the same production processes.
  • FIG. 4 illustrates the fourth step of the same production processes.
  • FIG. 5 illustrates the fifth step of the same production processes.
  • FIG. 6 illustrates the final step of the same production processes.
  • FIG. 7 illustrates the first step of the processes for producing a fusion-connected coupler according to a conventional method.
  • FIG. 8 illustrates the final step of the above production processes.
  • FIGS. 1 to 6 illustrate the processes for producing a fiber-fused coupler according to this invention.
  • two optical fiber cords 1 and 2 comprising optical fiber core lines 3 and 4 having respective resilient fibers 5 and 6 running along their lengths and covered with jackets 7 and 8 are placed in parallel as shown in FIG. 1.
  • the jackets 7 and 8 have their both ends cut to have a specified length, to expose thereby the both ends of optical fiber core lines 3 and 4 and of their resilient fibers 5 and 6 .
  • the jackets 7 and 8 covering the optical fiber core lines 1 and 2 are cut at specified levels 7 c and 8 c at the middle of their lengths, to be divided into two limbs each; and the jacket limbs 9 and 9 ′ and the jacket limbs 10 and 10 ′ are slid in opposite directions such that the interval between the inward ends 9 a and 9 ′ a of jacket 9 , and the interval between the inward ends 10 a and 10 ′ a of jacket 10 are sufficiently large to allow the work necessary for connection, and the outward ends 9 b and 9 ′ b and 10 b and 10 ′ b are in short by a sufficient length of the outward ends ( 3 a , 4 a and 5 a , 6 a ) of their respective optical fiber core lines 3 , 4 and resilient fibers 5 , 6 .
  • the exposed mid-portions of optical fiber core lines 3 and 4 are brought into contact with each other as shown in FIGS. 4 and 5; the contacted portions are heated to melt to form thereby a fusion-connected section 11 ; and the separated jacket limbs 9 and 9 ′ and 10 and 10 ′ are slid back close to the fusion-connected section 11 .
  • the fusion-connected section 11 with the inward ends 9 a and 9 ′ a of jacket limbs 9 and 9 ′, and the inward ends 10 a and 10 ′ a of jacket limbs 10 and 10 ′ is placed in a protective case 12 as shown in FIG. 6; a hardening resin such as an epoxy resin 13 is introduced into the cavity within the protective case 12 to fill the cavity; and, when the resin hardens, the involved elements and their connection are integrated within the protective case 12 .
  • a hardening resin such as an epoxy resin 13
  • the resilient fibers 5 , 6 may be made of any material incorporated in a conventional optical fiber cord, such as aramid fiber, glass fiber, copper wire, PBO fiber, etc.
  • the jacket 7 , 8 may be made of a thermoplastic resin, thermosetting resin, UV-hardening resin, etc.
  • the above embodiment based on the method of this invention for producing a fiber-fused coupler involves connecting two optical fiber cables 1 and 2 , but it may also involve connecting two optical fiber tape cords, instead of cables. Needless to say, the number of optical fiber cables or optical fiber tape cords to be connected is not limited to two, but may take three or more as desired.
  • a plurality of optical fiber cords are placed in parallel each of which comprises an optical fiber core line covered with a jacket with resilient fibers inserted between the periphery of the core line and the jacket; a cut is made on a specified point of the jacket of each optical fiber core line to divide the jacket into two limbs, and the divided limbs of each jacket are moved in opposite directions to expose thereby a section of the underlying optical fiber core line; the exposed sections of the optical fibers are connected by fusion; each jacket limb displaced towards the outward end and kept there is slid back close to the fusion-connected section; the fusion-connected section together with the inward ends of jacket limbs are placed in a protective case; and a hardening resin is hardened to integrate the involved elements and their connection.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Abstract

The object of this invention is to provide a method for producing a coupler based on fiber-fused connection which will enable simple, rapid production of a coupler in a highly productive manner, no matter how many optical fiber core lines may be involved or no matter how small their diameter may be.
The method consists of placing a plurality of optical fiber cords 1,2 in parallel which comprise optical fiber core lines 3,4 covered with jackets 7,8 with resilient fibers 5,6 inserted between the periphery of the core lines and the jackets; cutting a specified point of the jacket of each optical fiber core line to divide the jacket into two limbs; sliding the divided limbs (9,9′ and 10,10′ ) of the jackets in opposite directions to expose thereby sections of the underlying optical fiber core lines, the exposed sections of optical fibers being brought into contact with each other, and heated to melt to form thereby a fusion-connected section 11; sliding back each jacket limb close to the fusion-connected section; and placing the fusion-connected section 11 together with the inward ends of jacket limbs in a protective case 12, a hardening resin 13 being introduced into the cavity within the protective case 12 to fill the cavity, and the resin being hardened to integrate the optical fiber cords with their connection within the protective case.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention [0001]
  • The present invention relates to a method for producing a coupler based on fiber-fused connection. [0002]
  • 2. Prior Art [0003]
  • Recently, with the increased spread of sophisticated communication systems, transmission systems based on optical fibers have been increasingly introduced for the connection of LANs and other networks to promote OA and FA. [0004]
  • In a LAN based on optical fibers, optical separators and couplers are more frequently used than before for distributing light signals to multiple terminals and for transmitting signals in the reverse direction. [0005]
  • The conventional optical separator/coupler mainly incorporates a coupler (star coupler) having multiple input terminals to serve as a key element of an optical data bas network. As this communication network enables a signal transmitted from any one terminal connected to the coupler to be distributed to the other terminals, its application becomes increasingly widened. [0006]
  • The coupler as described above is conventionally fabricated as follows. As shown in FIGS. 7 and 8, two optical fiber core lines (a) and (b) are closely placed together to bring their clads at the middle of their lengths in contact with each other; the contacted clads are heated to melt to form a fusion-connected section (c); jackets (d[0007] 1), (d2), (d3) and (d4) are placed over the both limbs of each of optical fiber core lines (a) and (b) being moved from their ends (a1), (b1), (a2) and (b2), respectively; the fusion-connected section (c) together with the four ends of jacket limbs close to it are placed in a protective case (e); a hardening resin (f) such as an epoxy resin is introduced into the cavity within the protective case (e) to fill the cavity; and, when the resin is hardened, a coupler integral with the optical fiber core lines is obtained.
  • Resilient fibers inserted longitudinally beneath the jackets (d[0008] 1), (d2), (d3) and (d4) and over the periphery of optical fiber core lines (a) and (b) are represented by (g) in the figures.
  • However, with the conventional method for fabricating a coupler as described above, it is necessary, after fused-connection is performed on optical fiber core lines to be coupled, to place tubular jackets over the limbs of the optical fiber core lines one after another while those lines have resilient fibers disposed around their peripheries. Therefore, fabrication based on the conventional method is poor in workability, produces too voluminous fusion-connected sections, and is high in the cost. [0009]
  • Particularly when a coupler involving multiple, small-bore optical fiber core lines with correspondingly slender jackets is fabricated, the fabrication requires much labor and time, and often poses a problem in productivity. Moreover, a coupler produced by the conventional method, if it has to be sufficiently reinforced, becomes voluminous and expensive, while it becomes fragile when it is left small. [0010]
    • SUMMARY OF THE INVENTION
  • This invention was derived from an attempt to meet the above problems inherent to the conventional technique, and aims at providing a method for fabricating a fusion-connected coupler which enables simple, rapid production of a small, robust and inexpensive coupler in a highly productive manner. [0011]
  • To attain the above object, the method for fabricating a coupler according to this invention consists of placing a plurality of optical fiber cords in parallel each of which comprises an optical fiber core line covered with a jacket with resilient fibers disposed longitudinally around the periphery of the core line beneath the jacket; a cut is made on a specified point on the jacket of each optical fiber core line to divide the jacket into two limbs, and the divided limbs of each jacket are slid in opposite directions to expose thereby the middle section of the underlying optical fiber core line; the exposed sections of optical core lines are brought into contact with each other; the contacted sections are heated to melt to form thereby a fusion-connected section; each jacket limb displaced outward is slid back close to the fusion-connected section; the fusion-connected section together with the cut ends of jacket limbs close to it are placed in a protective case; a hardening resin such as an epoxy resin is introduced into the cavity within the protective case to fill the cavity; and, when the resin is hardened, the involved elements and their connection are integrated within the protective case.[0012]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 illustrates the first step of the processes for producing a fusion-connected coupler according to the method of this invention. [0013]
  • FIG. 2 illustrates the second step of the same production processes. [0014]
  • FIG. 3 illustrates the third step of the same production processes. [0015]
  • FIG. 4 illustrates the fourth step of the same production processes. [0016]
  • FIG. 5 illustrates the fifth step of the same production processes. [0017]
  • FIG. 6 illustrates the final step of the same production processes. [0018]
  • FIG. 7 illustrates the first step of the processes for producing a fusion-connected coupler according to a conventional method. [0019]
  • FIG. 8 illustrates the final step of the above production processes.[0020]
    • DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • The preferred embodiments of this invention will be detailed below with reference to attached figures. [0021]
  • FIGS. [0022] 1 to 6 illustrate the processes for producing a fiber-fused coupler according to this invention.
  • Firstly, two [0023] optical fiber cords 1 and 2 comprising optical fiber core lines 3 and 4 having respective resilient fibers 5 and 6 running along their lengths and covered with jackets 7 and 8 are placed in parallel as shown in FIG. 1. In the figure, the jackets 7 and 8 have their both ends cut to have a specified length, to expose thereby the both ends of optical fiber core lines 3 and 4 and of their resilient fibers 5 and 6.
  • Next, as shown in FIGS. 2 and 3, the [0024] jackets 7 and 8 covering the optical fiber core lines 1 and 2 are cut at specified levels 7 c and 8 c at the middle of their lengths, to be divided into two limbs each; and the jacket limbs 9 and 9′ and the jacket limbs 10 and 10′ are slid in opposite directions such that the interval between the inward ends 9 a and 9′a of jacket 9, and the interval between the inward ends 10 a and 10′a of jacket 10 are sufficiently large to allow the work necessary for connection, and the outward ends 9 b and 9′b and 10 b and 10′b are in short by a sufficient length of the outward ends (3 a, 4 a and 5 a, 6 a) of their respective optical fiber core lines 3,4 and resilient fibers 5,6.
  • As seen from above and from FIGS. 1 and 2, when [0025] jackets 7 and 8 are cut at levels 7 c and 8 c close to the middle, and the divided limbs of the jackets are separated by a specified distance, the outward ends 9 b and 9′b of the limbs of jacket 7 and the outward ends 10 b and 10′b of the limbs of jacket 8 are placed inward with respect to the ends (3 a, 4 a and 5 a, 6 a) of their respective optical fiber core lines (3,4) and resilient fibers (5,6), to expose thereby the specific lengths of the both ends of optical fiber core lines 3, 4 and of resilient fibers 5,6.
  • Then, the exposed mid-portions of optical [0026] fiber core lines 3 and 4 are brought into contact with each other as shown in FIGS. 4 and 5; the contacted portions are heated to melt to form thereby a fusion-connected section 11; and the separated jacket limbs 9 and 9′ and 10 and 10′ are slid back close to the fusion-connected section 11.
  • Next, the fusion-connected [0027] section 11 with the inward ends 9 a and 9′a of jacket limbs 9 and 9′, and the inward ends 10 a and 10′a of jacket limbs 10 and 10′ is placed in a protective case 12 as shown in FIG. 6; a hardening resin such as an epoxy resin 13 is introduced into the cavity within the protective case 12 to fill the cavity; and, when the resin hardens, the involved elements and their connection are integrated within the protective case 12.
  • The [0028] resilient fibers 5, 6 may be made of any material incorporated in a conventional optical fiber cord, such as aramid fiber, glass fiber, copper wire, PBO fiber, etc. The jacket 7, 8 may be made of a thermoplastic resin, thermosetting resin, UV-hardening resin, etc.
  • The above embodiment based on the method of this invention for producing a fiber-fused coupler involves connecting two [0029] optical fiber cables 1 and 2, but it may also involve connecting two optical fiber tape cords, instead of cables. Needless to say, the number of optical fiber cables or optical fiber tape cords to be connected is not limited to two, but may take three or more as desired.
  • The present invention has been described above, and will be briefly summarized as follows: a plurality of optical fiber cords are placed in parallel each of which comprises an optical fiber core line covered with a jacket with resilient fibers inserted between the periphery of the core line and the jacket; a cut is made on a specified point of the jacket of each optical fiber core line to divide the jacket into two limbs, and the divided limbs of each jacket are moved in opposite directions to expose thereby a section of the underlying optical fiber core line; the exposed sections of the optical fibers are connected by fusion; each jacket limb displaced towards the outward end and kept there is slid back close to the fusion-connected section; the fusion-connected section together with the inward ends of jacket limbs are placed in a protective case; and a hardening resin is hardened to integrate the involved elements and their connection. This methods dispenses with the need for removal of the jacket from each optical fiber core line during the work for connection, no matter how many small-bore optical fiber core lines may be involved. Therefore, fabrication based on the method of this invention will reduce a loss involved in the labor and time required for completion of the product as compared with the conventional method, and will ensure such excellent productivity and workability as to enable the production of densely integrated, robust products. [0030]

Claims (1)

What is claimed is:
1. Method for producing a coupler based on fiber-fused connection comprising the steps of:
placing a plurality of optical fiber cords in parallel each of which comprises an optical fiber core line with resilient fibers disposed around its periphery, being collectively covered with a jacket;
cutting a specified point of the jacket of each optical fiber core line to divide the jacket into two limbs;
sliding the divided limbs of each jacket in opposite directions to expose thereby a section of the underlying optical fiber core line, the exposed sections of the optical fibers being brought into contact with each other, and the contacted sections being heated to melt to form thereby a fusion-connected section;
sliding back each jacket limb close to the fusion-connected section; and
placing the fusion-connected section together with the inward ends of jacket limbs in a protective case, a hardening resin such as an epoxy resin being introduced into the cavity within the protective case to fill the cavity, and the resin being hardened to integrate the optical fiber cords within the protective case.
US09/821,767 2000-05-15 2001-03-30 Method for producing a coupler based on fiber-fused connection Expired - Fee Related US6431767B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-142400 2000-05-15
JP2000142400A JP4152564B2 (en) 2000-05-15 2000-05-15 Manufacturing method of fiber fusion type coupler

Publications (2)

Publication Number Publication Date
US20020006254A1 true US20020006254A1 (en) 2002-01-17
US6431767B2 US6431767B2 (en) 2002-08-13

Family

ID=18649381

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/821,767 Expired - Fee Related US6431767B2 (en) 2000-05-15 2001-03-30 Method for producing a coupler based on fiber-fused connection

Country Status (8)

Country Link
US (1) US6431767B2 (en)
JP (1) JP4152564B2 (en)
CN (1) CN1201176C (en)
CA (1) CA2345455A1 (en)
DE (1) DE10121327A1 (en)
FR (1) FR2810120B1 (en)
GB (1) GB2362476B (en)
TW (1) TW586034B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150125117A1 (en) * 2013-11-06 2015-05-07 Baker Hughes Incorporated Fiber optic mounting arrangement and method of coupling optical fiber to a tubular
US9335502B1 (en) 2014-12-19 2016-05-10 Baker Hughes Incorporated Fiber optic cable arrangement
US9488794B2 (en) 2012-11-30 2016-11-08 Baker Hughes Incorporated Fiber optic strain locking arrangement and method of strain locking a cable assembly to tubing
US10668706B2 (en) 2013-11-12 2020-06-02 Baker Hughes, A Ge Company, Llc Distributed sensing system employing a film adhesive

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7065267B2 (en) 2002-11-14 2006-06-20 Finisar Corporation Athermal fused coupler package for optical fibers
CN100456066C (en) * 2006-11-17 2009-01-28 哈尔滨工程大学 Single fiber and multi-core fiber coupler and fused biconic taper coupling method thereof
CA2636096A1 (en) * 2007-08-02 2009-02-02 Shawcor Ltd. System for splicing fiber optic drop cables
US8676012B2 (en) * 2012-01-20 2014-03-18 Corning Cable Systems Llc Fiber optic cable for very-short-distance networks

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2186097A (en) * 1986-01-31 1987-08-05 Stc Plc Optical fibre splice reinstatement sheathing
US4906068A (en) * 1988-09-01 1990-03-06 Minnesota Mining And Manufacturing Company Polarization-maintaining optical fibers for coupler fabrication
US5054868A (en) * 1990-08-29 1991-10-08 The United States Of America As Represented By The Secretary Of The Navy Armored optical fiber cable interconnection for dual payout systems
EP0646814B1 (en) * 1993-04-19 2002-12-04 Sumitomo Electric Industries, Ltd. Multi-fiber type optical cable coupler and process for production thereof
US5802224A (en) * 1994-05-23 1998-09-01 Kyocera Corporation Optical coupler for performing light branching and light mixing/branch filtering in a light communication network
US5479548A (en) * 1994-05-27 1995-12-26 Honeywell Inc. Fiber-optic coupler package
JP4237871B2 (en) * 1999-05-27 2009-03-11 京セラ株式会社 Optical fiber coupler, manufacturing method thereof, and optical amplifier using the same
KR100358418B1 (en) * 2000-02-28 2002-10-25 한국과학기술원 Method of fabricating fused-type mode selective coupler

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9488794B2 (en) 2012-11-30 2016-11-08 Baker Hughes Incorporated Fiber optic strain locking arrangement and method of strain locking a cable assembly to tubing
US20150125117A1 (en) * 2013-11-06 2015-05-07 Baker Hughes Incorporated Fiber optic mounting arrangement and method of coupling optical fiber to a tubular
US10668706B2 (en) 2013-11-12 2020-06-02 Baker Hughes, A Ge Company, Llc Distributed sensing system employing a film adhesive
US9335502B1 (en) 2014-12-19 2016-05-10 Baker Hughes Incorporated Fiber optic cable arrangement

Also Published As

Publication number Publication date
FR2810120B1 (en) 2006-07-28
CN1323993A (en) 2001-11-28
CN1201176C (en) 2005-05-11
US6431767B2 (en) 2002-08-13
DE10121327A1 (en) 2001-11-22
FR2810120A1 (en) 2001-12-14
JP4152564B2 (en) 2008-09-17
GB0108137D0 (en) 2001-05-23
GB2362476B (en) 2003-09-03
GB2362476A (en) 2001-11-21
CA2345455A1 (en) 2001-11-15
JP2001324642A (en) 2001-11-22
TW586034B (en) 2004-05-01

Similar Documents

Publication Publication Date Title
EP0139533B1 (en) A method for switching between optical cables in a communication line
US6215930B1 (en) Remote-splitter fiber optic cable
CA1294805C (en) Optical fused couplers
JPH04229909A (en) Communication cable, its connection and manufacture
EP0332945B1 (en) Optical cable network
US6431767B2 (en) Method for producing a coupler based on fiber-fused connection
WO2004079402A3 (en) Fiber optic assemblies and methods of making the same
JPH08304675A (en) Coated optical fiber
US6008455A (en) Method and arrangement for minimizing skew
US6609836B1 (en) Method for coupling fiber optic elements
US4647146A (en) Interconnection of optical fiber cables
US20030179980A1 (en) Optical circuit with ribbonization
KR100217226B1 (en) Optical fiber connecting ferrule manufacturing method
JP4995690B2 (en) Manufacturing method of optical fiber branch structure
US6546164B1 (en) Miniature dense wavelength division multiplexer using microbend couplers
JP3853599B2 (en) Manufacturing method of optical fiber sheet with optical connector
JP3239725B2 (en) Method for manufacturing single-core / multi-core converter of optical fiber
CN106873102B (en) Optical cable and optical cable manufacturing method
JPH0954217A (en) Method for branching and wiring optical fiber cable
Haag et al. Optical fiber cables for subscriber loops
JPH0862459A (en) Single coated optical fiber
JP2007148089A (en) Optical fiber sheet
JPH06273647A (en) Jumper tape for multicore tape conductor
JPH08211259A (en) Coated optical fiber
US20030118287A1 (en) Method for designing polarization maintaining couplers

Legal Events

Date Code Title Description
CC Certificate of correction
AS Assignment

Owner name: NISSHO MUSEN CO., LTD, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NAGASAKI, HIRONOBU;REEL/FRAME:013868/0255

Effective date: 20030306

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20060813