JPS5556024A - Production of optical fiber - Google Patents

Production of optical fiber

Info

Publication number
JPS5556024A
JPS5556024A JP12966378A JP12966378A JPS5556024A JP S5556024 A JPS5556024 A JP S5556024A JP 12966378 A JP12966378 A JP 12966378A JP 12966378 A JP12966378 A JP 12966378A JP S5556024 A JPS5556024 A JP S5556024A
Authority
JP
Japan
Prior art keywords
glass
tube
core
clad
optical fiber
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
JP12966378A
Other languages
Japanese (ja)
Inventor
Toshihide Tokunaga
Junkichi Nakagawa
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.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable 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 Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP12966378A priority Critical patent/JPS5556024A/en
Publication of JPS5556024A publication Critical patent/JPS5556024A/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
    • C03B37/02—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

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 produce a crack-free optical fiber with a large core diameter and high numerical aperture in a short time by melting low m.p. glass as core in a glass tube as clad followed by immediate drawing. CONSTITUTION:Glass tube 1 with the tip closed is made of relatively high m.p. glass such as quartz glass or Vycor glass. Low m.p. glass praticles 2 with an average diameter of about 1mm as core are charged into tube 1 as clad and heated to 1900- 2000 deg.C in electric furnace 4 to convert particles 2 into molten glass 3. At the same time, by blowing oxygen gas, nitrogen gas, etc. into tube 1 from internal press. control pipe 5 the inside of tube 1 is held under a pressurizing atomosphere, and tube 1 and glass 3 are drawn to obtain optical fiber 8 having core and clad.
JP12966378A 1978-10-20 1978-10-20 Production of optical fiber Pending JPS5556024A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12966378A JPS5556024A (en) 1978-10-20 1978-10-20 Production of optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12966378A JPS5556024A (en) 1978-10-20 1978-10-20 Production of optical fiber

Publications (1)

Publication Number Publication Date
JPS5556024A true JPS5556024A (en) 1980-04-24

Family

ID=15015062

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12966378A Pending JPS5556024A (en) 1978-10-20 1978-10-20 Production of optical fiber

Country Status (1)

Country Link
JP (1) JPS5556024A (en)

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