GB1134466A - Improvements in or relating to the manufacture of optical fibres - Google Patents

Improvements in or relating to the manufacture of optical fibres

Info

Publication number
GB1134466A
GB1134466A GB3811367A GB3811367A GB1134466A GB 1134466 A GB1134466 A GB 1134466A GB 3811367 A GB3811367 A GB 3811367A GB 3811367 A GB3811367 A GB 3811367A GB 1134466 A GB1134466 A GB 1134466A
Authority
GB
United Kingdom
Prior art keywords
glass
rod
crucible
core
sheath
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
GB3811367A
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.)
Compagnie de Saint Gobain SA
Original Assignee
Compagnie de Saint Gobain SA
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 Compagnie de Saint Gobain SA filed Critical Compagnie de Saint Gobain SA
Publication of GB1134466A publication Critical patent/GB1134466A/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
    • C03B37/022—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from molten glass in which the resultant product consists of different sorts of glass or is characterised by shape, e.g. hollow fibres, undulated fibres, fibres presenting a rough surface
    • C03B37/023—Fibres composed of different sorts of glass, e.g. glass optical fibres, made by the double crucible technique
    • 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
    • C03B37/08—Bushings, e.g. construction, bushing reinforcement means; Spinnerettes; Nozzles; Nozzle plates
    • C03B37/085—Feeding devices therefor
    • 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
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
    • 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
    • C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
    • C03B2201/34—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with rare earth metals, i.e. with Sc, Y or lanthanides, e.g. for laser-amplifiers
    • 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
    • C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
    • C03B2201/40—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with transition metals other than rare earth metals, e.g. Zr, Nb, Ta or Zn
    • 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
    • C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
    • C03B2201/54—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with beryllium, magnesium or alkaline earth metals

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

1,134,466. Drawing glass coated glass fibres. COMPAGNIE DE SAINT GOBAIN. 18 Aug., 1967 [19 Aug., 1966], No. 38113/67. Heading C1M. In the manufacture of optical fibres 15, comprising a glass core and a sheath of a different glass, by drawing the fibre through coaxial orifices 7a, 8a in the bottoms of two crucibles 7, 8 placed one within the other, the outer crucible 8 contains the sheath glass 10 and a rod 1 made of the core glass is introduced into the inner crucible 7 and the drawing speed, the temperature of the glass 10 and the length of the rod 1 extending into the inner crucible 7 are regulated so as to maintain only a low level of core glass in the bottom of the inner crucible. This reduces the time at which the core glass is kept at drawing temperature and prevents discoloration and devitrification. The crucible 8 is surrounded by electric heating means 9 and the rod 1 is heated by the molten glass 10. The rod 1 is secured to a bracket 2 movable vertically by a screwthreaded rod 3 rotated from shaft 4 by gear-wheels 5 and 6, the rate of lowering being adjusted according to the speed of the drawing rolls 14 and the temperatures used. The crucible 7 is mounted on an arm 11 fixed to a bracket 13 by an adjusting screw 12 so that the relative positions of the orifices 7a, 8a can be adjusted to control the thickness of the sheath. To avoid bubbles in the glass in the inner crucible, a platinum filament may be secured to the crucible so as to lie between the rod 1 and the level of the glass to guide the thread of glass from the rod. The orifice 7a may be tapered to extend into a tapered orifice 8a. The glass core may have the following composition in percentages by weight: SiO 2 14; B 2 O 3 17; BaO 48.5; La 2 O 3 10.5; ThO 2 10.
GB3811367A 1966-08-19 1967-08-18 Improvements in or relating to the manufacture of optical fibres Expired GB1134466A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR73564A FR1496223A (en) 1966-08-19 1966-08-19 Process and device for the manufacture of so-called fibers

Publications (1)

Publication Number Publication Date
GB1134466A true GB1134466A (en) 1968-11-27

Family

ID=8615653

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3811367A Expired GB1134466A (en) 1966-08-19 1967-08-18 Improvements in or relating to the manufacture of optical fibres

Country Status (6)

Country Link
BE (1) BE702786A (en)
CH (1) CH461041A (en)
DE (1) DE1596395A1 (en)
FR (1) FR1496223A (en)
GB (1) GB1134466A (en)
NL (1) NL6710750A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2064320A1 (en) * 1969-10-14 1971-07-23 Pilkington Brothers Ltd
US4249925A (en) * 1978-05-12 1981-02-10 Fujitsu Limited Method of manufacturing an optical fiber
US4289516A (en) * 1979-10-04 1981-09-15 Eotec Corporation Low loss optical fibers

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3791806A (en) * 1969-12-30 1974-02-12 Nippon Selfoc Co Ltd Continuous production of light-conducting glass fibers with ion diffusion
JPS4922465B1 (en) * 1969-12-30 1974-06-08
CA972159A (en) * 1970-12-28 1975-08-05 Owens-Corning Fiberglas Corporation Method and apparatus for producing filaments from streams of heat softened material
GB1507144A (en) * 1974-07-10 1978-04-12 Post Office Apparatus for drawing dielectric optical waveguides
GB1541442A (en) * 1975-06-26 1979-02-28 Standard Telephones Cables Ltd Glass optical fibre manufacture
GB1532571A (en) * 1976-02-03 1978-11-15 Standard Telephones Cables Ltd Optical fibre manufacture
DE2654308A1 (en) * 1976-11-30 1978-06-01 Siemens Ag DOUBLE CRUCIBLE PLANT FOR THE MANUFACTURING OF FIBER OPTICS
IT1145605B (en) * 1981-12-22 1986-11-05 Cselt Centro Sudi E Lab Teleco APPARATUS AND PROCEDURE FOR THE PRODUCTION OF OPTICAL FIBERS
CN108383372B (en) * 2016-03-31 2020-08-21 杭州富通通信技术股份有限公司 Optical fiber processing technology
CN110981180B (en) * 2019-12-13 2021-10-15 中国科学院西安光学精密机械研究所 Device and method for preparing single-mode optical fiber preform

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2064320A1 (en) * 1969-10-14 1971-07-23 Pilkington Brothers Ltd
US4249925A (en) * 1978-05-12 1981-02-10 Fujitsu Limited Method of manufacturing an optical fiber
US4289516A (en) * 1979-10-04 1981-09-15 Eotec Corporation Low loss optical fibers

Also Published As

Publication number Publication date
CH461041A (en) 1968-08-15
FR1496223A (en) 1967-09-29
NL6710750A (en) 1968-02-20
DE1596395A1 (en) 1971-03-04
BE702786A (en) 1968-02-19

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