JPS55144434A - Producing optical communication fiber - Google Patents

Producing optical communication fiber

Info

Publication number
JPS55144434A
JPS55144434A JP5103879A JP5103879A JPS55144434A JP S55144434 A JPS55144434 A JP S55144434A JP 5103879 A JP5103879 A JP 5103879A JP 5103879 A JP5103879 A JP 5103879A JP S55144434 A JPS55144434 A JP S55144434A
Authority
JP
Japan
Prior art keywords
tube
matrix
rod
diameter
contraction
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.)
Pending
Application number
JP5103879A
Other languages
Japanese (ja)
Inventor
Kazunori Senda
Kunio Fujiwara
Gotaro Tanaka
Naoki Yoshioka
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.)
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries 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 Nippon Telegraph and Telephone Corp, Sumitomo Electric Industries Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP5103879A priority Critical patent/JPS55144434A/en
Publication of JPS55144434A publication Critical patent/JPS55144434A/en
Pending 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
    • C03B37/012—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
    • C03B37/01248—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing by collapsing without drawing
    • 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
    • C03B2201/31—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with germanium

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)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

PURPOSE:To economically provide optical communication fibers having good precision in lengthwise direction while reducing heat needed for contracting diameter by a method wherein the internal of base material tube is exhausted to vacuum in process diameter-contraction heating in which matrix rod is inserted into matrix tube. CONSTITUTION:A core-forming matrix rod 1 for optical fiber consists of silica glass containing dopant such as Ge2O3 which enhances refractive index. Such a rod 1 is inserted into pure silica matrix tube 2 in concentric way, one end 4 is sealed, the other end 5 is exhausted by vacuum pump 6 and is made vacuum. The matrix tube 2 is heated by moving oxy-hydrogen burner 7 in lengthwise direction at a given speed, so that the diameter of the tube 2 is contracted while maintaining the tube 2 temperature below decomposition temperature of dopant on the surface of the rod 1 or below deformation temperature of the rod 1. The obtained matrix is heated and melted as usual, is drawn, and made into fine fiber. Diameter contraction at low temperature and under reduced pressure eliminates remaining bubble due to thermal decomposition of Ge2O3 and reduces required heat and deformation due to diameter contraction.
JP5103879A 1979-04-24 1979-04-24 Producing optical communication fiber Pending JPS55144434A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5103879A JPS55144434A (en) 1979-04-24 1979-04-24 Producing optical communication fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5103879A JPS55144434A (en) 1979-04-24 1979-04-24 Producing optical communication fiber

Publications (1)

Publication Number Publication Date
JPS55144434A true JPS55144434A (en) 1980-11-11

Family

ID=12875625

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5103879A Pending JPS55144434A (en) 1979-04-24 1979-04-24 Producing optical communication fiber

Country Status (1)

Country Link
JP (1) JPS55144434A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60155542A (en) * 1984-01-23 1985-08-15 Nippon Sheet Glass Co Ltd Method for molding fiber for optical communication
JPS6246931A (en) * 1985-08-23 1987-02-28 Sumitomo Electric Ind Ltd Production of base material for optical fiber
WO2000078686A1 (en) * 1999-06-22 2000-12-28 Mitsubishi Cable Industries, Ltd. Production method for optical fiber base material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60155542A (en) * 1984-01-23 1985-08-15 Nippon Sheet Glass Co Ltd Method for molding fiber for optical communication
JPS6246931A (en) * 1985-08-23 1987-02-28 Sumitomo Electric Ind Ltd Production of base material for optical fiber
WO2000078686A1 (en) * 1999-06-22 2000-12-28 Mitsubishi Cable Industries, Ltd. Production method for optical fiber base material
EP1203755A1 (en) * 1999-06-22 2002-05-08 Mitsubishi Cable Industries, Ltd. Production method for optical fiber base material
EP1203755A4 (en) * 1999-06-22 2011-04-13 Mitsubishi Cable Ind Ltd Production method for optical fiber base material

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