GB1435523A - Glass fibre optical waveguide - Google Patents

Glass fibre optical waveguide

Info

Publication number
GB1435523A
GB1435523A GB3259473A GB3259473A GB1435523A GB 1435523 A GB1435523 A GB 1435523A GB 3259473 A GB3259473 A GB 3259473A GB 3259473 A GB3259473 A GB 3259473A GB 1435523 A GB1435523 A GB 1435523A
Authority
GB
United Kingdom
Prior art keywords
fibre
tube
core
cladding
refractive index
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.)
Expired
Application number
GB3259473A
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.)
National Institute of Advanced Industrial Science and Technology AIST
Original Assignee
Agency of Industrial Science and Technology
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
Priority claimed from JP6899472A external-priority patent/JPS5722900B2/ja
Priority claimed from JP47068993A external-priority patent/JPS4929653A/ja
Priority claimed from JP47090930A external-priority patent/JPS5937481B2/en
Priority claimed from JP11624872A external-priority patent/JPS4975624A/ja
Application filed by Agency of Industrial Science and Technology filed Critical Agency of Industrial Science and Technology
Publication of GB1435523A publication Critical patent/GB1435523A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
    • C03B37/02754—Solid fibres drawn from hollow preforms
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/20—Uniting glass pieces by fusing without substantial reshaping
    • C03B23/207—Uniting glass rods, glass tubes, or hollow glassware
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C13/00—Fibre or filament compositions
    • C03C13/04—Fibre optics, e.g. core and clad fibre compositions
    • C03C13/045—Silica-containing oxide glass compositions
    • 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
    • G02B6/2552—Splicing of light guides, e.g. by fusion or bonding reshaping or reforming of light guides for coupling using thermal heating, e.g. tapering, forming of a lens on light guide ends
    • 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
    • G02B6/262—Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4202—Packages, e.g. shape, construction, internal or external details for coupling an active element with fibres without intermediate optical elements, e.g. fibres with plane ends, fibres with shaped ends, bundles
    • G02B6/4203—Optical features
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/02—Pure silica glass, e.g. pure fused quartz
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/08—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant
    • C03B2201/10—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant doped with boron
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/02—External structure or shape details
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/10—Internal structure or shape details
    • C03B2203/22—Radial profile of refractive index, composition or softening point
    • C03B2203/28—Large core fibres, e.g. with a core diameter greater than 60 micrometers
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/12—Drawing solid optical fibre directly from a hollow preform
    • C03B2205/14—Drawing solid optical fibre directly from a hollow preform comprising collapse of an outer tube onto an inner central solid preform rod
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/12—Drawing solid optical fibre directly from a hollow preform
    • C03B2205/16—Drawing solid optical fibre directly from a hollow preform the drawn fibre consisting of circularly symmetric core and clad

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

1435523 Optical waveguide AGENCY OF INDUSTRIAL SCIENCE & TECHNOLOGY 9 July 1973 [12 July 1972 (2) 12 Sept 1972 21 Nov 1972] 32594/73 Heading C1M A glass fibre optical waveguide consists of a core material 1 and a cladding material 2 of lower refractive index than the core, the core material being undoped fused silica, and the cladding material being a glass containing at least 80% by weight of SiO 2 . A suitable cladding glass, for use with a fused silica core (refractive index 1À4571), consists essentially of 96% by weight SiO 2 and 4% by weight B 2 O 3 , and has a refractive index of 1À4562. The optical fibre may be produced by inserting a rod 1 of core material in a tube 2 of cladding material, sealing both ends 3 of the tube 2 to the rod 1, evacuating tube 2 using air vent 5, sealing off the air vent 5, heating the structure obtained to soften both core and cladding glasses, and drawing the assembly to form the desired fibre. The heating is preferably carried out using an oxyhydrogen torch, and the fibre is preferably drawn to a diameter of 50-200 Ám. Impurities present in the rod/tube assembly may be reduced by heating the assembly in oxygen at 500-1000‹ C. before the evacuation of the tube 2. The fibre ends are preferably formed in a convex or concave curve (Figs. 5-10; not shown). Both such curves may be obtained by optical abrasion. Alternatively, the fibre ends may be fused, allowed to assume a convex face by surface tension, and cooled. Similarly, a clear adhesive agent (e.g. an epoxy resin) may be applied to the fibre end and allowed to form a convex curved surface.
GB3259473A 1972-07-12 1973-07-09 Glass fibre optical waveguide Expired GB1435523A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP6899472A JPS5722900B2 (en) 1972-07-12 1972-07-12
JP47068993A JPS4929653A (en) 1972-07-12 1972-07-12
JP47090930A JPS5937481B2 (en) 1972-09-12 1972-09-12 Optical transmission fiber with curved tip and method for manufacturing the same
JP11624872A JPS4975624A (en) 1972-11-21 1972-11-21

Publications (1)

Publication Number Publication Date
GB1435523A true GB1435523A (en) 1976-05-12

Family

ID=27465068

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3259473A Expired GB1435523A (en) 1972-07-12 1973-07-09 Glass fibre optical waveguide

Country Status (1)

Country Link
GB (1) GB1435523A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2441594A1 (en) * 1978-11-20 1980-06-13 Mitsubishi Metal Corp PROCESS FOR THE PREPARATION OF OPTICAL WAVEGUARD MATERIAL
US4264347A (en) * 1978-12-29 1981-04-28 Ltd. Dainichi-Nippon Cables Method of fabricating optical fiber preforms
US5613995A (en) * 1993-04-23 1997-03-25 Lucent Technologies Inc. Method for making planar optical waveguides
WO1997014066A3 (en) * 1995-10-12 1997-07-03 Sdl Inc Method for improving the coupling efficiency of elliptical light beams into optical waveguides
WO1999009437A1 (en) * 1997-08-19 1999-02-25 Pirelli Cavi E Sistemi S.P.A. Method of and apparatus for manufacturing an optical fiber preform
EP1172674A2 (en) * 2000-07-10 2002-01-16 Infineon Technologies AG Optical fiber for optically coupling a light source to a multimode optical fiber and method of making same

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2441594A1 (en) * 1978-11-20 1980-06-13 Mitsubishi Metal Corp PROCESS FOR THE PREPARATION OF OPTICAL WAVEGUARD MATERIAL
US4264347A (en) * 1978-12-29 1981-04-28 Ltd. Dainichi-Nippon Cables Method of fabricating optical fiber preforms
US5613995A (en) * 1993-04-23 1997-03-25 Lucent Technologies Inc. Method for making planar optical waveguides
WO1997014066A3 (en) * 1995-10-12 1997-07-03 Sdl Inc Method for improving the coupling efficiency of elliptical light beams into optical waveguides
US5701373A (en) * 1995-10-12 1997-12-23 Sdl, Inc. Method for improving the coupling efficiency of elliptical light beams into optical waveguides
WO1999009437A1 (en) * 1997-08-19 1999-02-25 Pirelli Cavi E Sistemi S.P.A. Method of and apparatus for manufacturing an optical fiber preform
US6584808B1 (en) 1997-08-19 2003-07-01 Pirelli Cavi E Sistemi S.P.A. Method of manufacturing an optical fiber preform by collapsing a tube onto a rod
EP1172674A2 (en) * 2000-07-10 2002-01-16 Infineon Technologies AG Optical fiber for optically coupling a light source to a multimode optical fiber and method of making same
EP1172674A3 (en) * 2000-07-10 2002-06-19 Infineon Technologies AG Optical fiber for optically coupling a light source to a multimode optical fiber and method of making same
US6529661B2 (en) 2000-07-10 2003-03-04 Infineon Technologies Ag Optical fiber for optically coupling a light radiation source to a multimode optical waveguide, and method for manufacturing it

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19930708