JPS5673636A - Manufacture of optical fiber base material - Google Patents

Manufacture of optical fiber base material

Info

Publication number
JPS5673636A
JPS5673636A JP14731879A JP14731879A JPS5673636A JP S5673636 A JPS5673636 A JP S5673636A JP 14731879 A JP14731879 A JP 14731879A JP 14731879 A JP14731879 A JP 14731879A JP S5673636 A JPS5673636 A JP S5673636A
Authority
JP
Japan
Prior art keywords
manufacture
optical fiber
base material
fiber base
furnace
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.)
Granted
Application number
JP14731879A
Other languages
Japanese (ja)
Other versions
JPS5854097B2 (en
Inventor
Takao Edahiro
Kazuo Sanada
Koichi Inada
Takeru Fukuda
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.)
Fujikura Ltd
NTT Inc
Original Assignee
Fujikura Ltd
Nippon Telegraph and Telephone Corp
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 Fujikura Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujikura Ltd
Priority to JP14731879A priority Critical patent/JPS5854097B2/en
Publication of JPS5673636A publication Critical patent/JPS5673636A/en
Publication of JPS5854097B2 publication Critical patent/JPS5854097B2/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
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Thermal 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 manufacture an optical fiber base material with high reproducibility in a short time by removing hydroxyl groups from a glass preform manufactured by a VAD method with a hydroxyl group removing gas under pressure. CONSTITUTION:Porous glass preform 2 is formed at the lower end of rodlike substrate 1 by a VAD method and set in hydroxyl group removing furnace 7. While feeding a hydroxyl group removing gas from introduction pipe 8 and keeping the internal pressure of furnace 7 about 5-20mm.H2O above atmospheric pressure, hydroxyl groups are removed from preform 2 to manufacture an anhydrous optical fiber base material. The pressurizing state is maintained by regulating the flow rate of exhaust gas with needle valve 11 of exhaust pipe 10 while detecting the internal pressure of furnace 7 with pressure gauge 9.
JP14731879A 1979-11-14 1979-11-14 Manufacturing method of optical fiber base material Expired JPS5854097B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14731879A JPS5854097B2 (en) 1979-11-14 1979-11-14 Manufacturing method of optical fiber base material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14731879A JPS5854097B2 (en) 1979-11-14 1979-11-14 Manufacturing method of optical fiber base material

Publications (2)

Publication Number Publication Date
JPS5673636A true JPS5673636A (en) 1981-06-18
JPS5854097B2 JPS5854097B2 (en) 1983-12-02

Family

ID=15427465

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14731879A Expired JPS5854097B2 (en) 1979-11-14 1979-11-14 Manufacturing method of optical fiber base material

Country Status (1)

Country Link
JP (1) JPS5854097B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS593032A (en) * 1982-06-24 1984-01-09 Hitachi Cable Ltd Manufacturing method of optical fiber base material
JPS6046938A (en) * 1983-08-19 1985-03-14 Hitachi Cable Ltd Manufacture of optical fiber preform

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS593032A (en) * 1982-06-24 1984-01-09 Hitachi Cable Ltd Manufacturing method of optical fiber base material
JPS6046938A (en) * 1983-08-19 1985-03-14 Hitachi Cable Ltd Manufacture of optical fiber preform

Also Published As

Publication number Publication date
JPS5854097B2 (en) 1983-12-02

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