JPS54147225A - Production of optical fiber - Google Patents

Production of optical fiber

Info

Publication number
JPS54147225A
JPS54147225A JP5633478A JP5633478A JPS54147225A JP S54147225 A JPS54147225 A JP S54147225A JP 5633478 A JP5633478 A JP 5633478A JP 5633478 A JP5633478 A JP 5633478A JP S54147225 A JPS54147225 A JP S54147225A
Authority
JP
Japan
Prior art keywords
clad layer
fine hole
core part
glass
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.)
Pending
Application number
JP5633478A
Other languages
Japanese (ja)
Inventor
Masao Kawashima
Hisanao Okada
Fumi Kikuchi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP5633478A priority Critical patent/JPS54147225A/en
Priority to US06/035,843 priority patent/US4249925A/en
Priority to CA000327258A priority patent/CA1119409A/en
Priority to NLAANVRAGE7903686,A priority patent/NL174640C/en
Priority to FR7912020A priority patent/FR2425411B1/en
Priority to GB7916441A priority patent/GB2023127B/en
Priority to DE2919080A priority patent/DE2919080B2/en
Publication of JPS54147225A publication Critical patent/JPS54147225A/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
    • C03B37/025—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
    • C03B37/02718—Thermal treatment of the fibre during the drawing process, e.g. cooling
    • 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
    • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
    • C03C25/10—Coating
    • C03C25/104—Coating to obtain optical fibres
    • C03C25/106—Single coatings
    • C03C25/1061—Inorganic coatings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

PURPOSE:The glass for clad layer is molten in a crucible having a fine hole at the bottom and a bare fiber for the core part is passed through the fine hole, thus making the boundary surface clear and preventing the turbulence of refractive index distribution. CONSTITUTION:The production of optical fibers consisting of core and clad two layers made of glasses different in refractive index from each other begins by heat drawing of the parent material for core part 31 to form bare fiber for core part. In the meantime, glass for clad layer 34 is molten in a crucible 36 having a fine hole at the bottom and the bare fiber is passed through the fine hole to form the clad layer, thus the objective optical fiber is produced. The glass for clad layer 34 has preferably lower refractive index, lower thermal expansion coefficient and lower viscosity compared with those of cored part 31, and further high drapeable on the core part.
JP5633478A 1978-05-12 1978-05-12 Production of optical fiber Pending JPS54147225A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP5633478A JPS54147225A (en) 1978-05-12 1978-05-12 Production of optical fiber
US06/035,843 US4249925A (en) 1978-05-12 1979-05-04 Method of manufacturing an optical fiber
CA000327258A CA1119409A (en) 1978-05-12 1979-05-09 Method of manufacturing an optical fiber
NLAANVRAGE7903686,A NL174640C (en) 1978-05-12 1979-05-10 METHOD FOR MANUFACTURING AN OPTICAL FIBER
FR7912020A FR2425411B1 (en) 1978-05-12 1979-05-11 METHOD FOR MANUFACTURING OPTICAL FIBER
GB7916441A GB2023127B (en) 1978-05-12 1979-05-11 Optical fibres
DE2919080A DE2919080B2 (en) 1978-05-12 1979-05-11 Process for making a core and clad optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5633478A JPS54147225A (en) 1978-05-12 1978-05-12 Production of optical fiber

Publications (1)

Publication Number Publication Date
JPS54147225A true JPS54147225A (en) 1979-11-17

Family

ID=13024296

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5633478A Pending JPS54147225A (en) 1978-05-12 1978-05-12 Production of optical fiber

Country Status (1)

Country Link
JP (1) JPS54147225A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4924441A (en) * 1972-06-27 1974-03-04
JPS52120840A (en) * 1976-04-05 1977-10-11 Hitachi Ltd Drawing method for optical fibers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4924441A (en) * 1972-06-27 1974-03-04
JPS52120840A (en) * 1976-04-05 1977-10-11 Hitachi Ltd Drawing method for optical fibers

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