GB1456537A - Optical fibre waveguides and their manufacture - Google Patents

Optical fibre waveguides and their manufacture

Info

Publication number
GB1456537A
GB1456537A GB1381174A GB1381174A GB1456537A GB 1456537 A GB1456537 A GB 1456537A GB 1381174 A GB1381174 A GB 1381174A GB 1381174 A GB1381174 A GB 1381174A GB 1456537 A GB1456537 A GB 1456537A
Authority
GB
United Kingdom
Prior art keywords
dopant
core
silica
fibre
tube
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
GB1381174A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1381174A priority Critical patent/GB1456537A/en
Publication of GB1456537A publication Critical patent/GB1456537A/en
Expired 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
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
    • G02B6/03605—Highest refractive index not on central axis
    • G02B6/03611—Highest index adjacent to central axis region, e.g. annular core, coaxial ring, centreline depression affecting waveguiding
    • 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
    • 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
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
    • G02B6/0281—Graded index region forming part of the central core segment, e.g. alpha profile, triangular, trapezoidal core

Landscapes

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

Abstract

1456537 Optical waveguides GENERAL ELECTRIC CO Ltd 25 March 1975 [28 March 1974] 13811/74 Heading C1M An optical waveguide comprising a fibre of vitreous silica containing a dopant so distributed that the fibre has a desired refractive index profile across any cross-section thereof, the dopant consisting of one or more non-metallic elements (e.g. N 2 ), each of which has been introduced into the fibre by exposure of at least part of the SiO 2 to the element(s) in gaseous form, is prepared by forming a rod or tube of the doped vitreous silica as a core component, and inserting the core into a cladding tube, either of pure vitreous silica or of silica containing the same dopant but in different concentration, the dopant being introduced into the silica of the core before, during or after formation of the core. The core/cladding assembly is then heated and drawn to a fibre, the dopant diffusing through the silica to give the desired refractive index profile. The vitreous silica may be prepared by oxidation of SiCl 4 vapour in a hydrogen-free atmosphere, the dopant being entrained in the reaction mixture. Alternatively, the dopant gas may be passed through a silica tube, a dopant-free gas being maintained outside the tube. The core/cladding assembly may be drawn at 1900-2000‹ C. in an Ar or Ar/O 2 atmosphere.
GB1381174A 1974-03-28 1974-03-28 Optical fibre waveguides and their manufacture Expired GB1456537A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1381174A GB1456537A (en) 1974-03-28 1974-03-28 Optical fibre waveguides and their manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1381174A GB1456537A (en) 1974-03-28 1974-03-28 Optical fibre waveguides and their manufacture

Publications (1)

Publication Number Publication Date
GB1456537A true GB1456537A (en) 1976-11-24

Family

ID=10029826

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1381174A Expired GB1456537A (en) 1974-03-28 1974-03-28 Optical fibre waveguides and their manufacture

Country Status (1)

Country Link
GB (1) GB1456537A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4203744A (en) * 1979-01-02 1980-05-20 Corning Glass Works Method of making nitrogen-doped graded index optical waveguides

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4203744A (en) * 1979-01-02 1980-05-20 Corning Glass Works Method of making nitrogen-doped graded index optical waveguides

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee