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JPS5669235A - Preparation of optical fiber - Google Patents

Preparation of optical fiber

Info

Publication number
JPS5669235A
JPS5669235A JP14568579A JP14568579A JPS5669235A JP S5669235 A JPS5669235 A JP S5669235A JP 14568579 A JP14568579 A JP 14568579A JP 14568579 A JP14568579 A JP 14568579A JP S5669235 A JPS5669235 A JP S5669235A
Authority
JP
Japan
Prior art keywords
tube
deposition
pressure
internal pressure
collapsed
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
JP14568579A
Other languages
Japanese (ja)
Other versions
JPS5742573B2 (en
Inventor
Akio Kawana
Michio Akiyama
Shinji Araki
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
Nippon Telegraph and Telephone Corp
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 JP14568579A priority Critical patent/JPS5669235A/en
Publication of JPS5669235A publication Critical patent/JPS5669235A/en
Publication of JPS5742573B2 publication Critical patent/JPS5742573B2/ja
Granted 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]
    • C03B37/018—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] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
    • 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

Landscapes

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

Abstract

PURPOSE:To prepare a preform rod in a short-time collapsing efficiently, by reducing the internal pressure of a deposition tube to a value lower than the outside air pressure, and heating the tube while making the internal pressure of a jacket glass tube put on the deposition tube much lower than said pressure. CONSTITUTION:A quartz glass tube is used as a starting tube 21 by the CVD internal deposition method to form a deposition glass layer 22 on the inner wall thereof. One end at the outlet side of the raw material gas of the deposition tube 20 is closed, and a quartz rod 30 is connected to the closed end. The tube 20 is then covered with a jacket tube 40 of quartz glass, and the internal pressure of the tube 20 is kept lower than the outside air pressure. The internal pressure of the tube 40 is kept much lower than the pressure, and the tubes are heated by a burner 50. Thus, the tube 40 is first collapsed, and then the tube 20 is collapsed to form a uniformly round collapsed preform rod 60. A core 61 is formed by the collapsing of the glass layer 22 on the tube 20.
JP14568579A 1979-11-09 1979-11-09 Preparation of optical fiber Granted JPS5669235A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14568579A JPS5669235A (en) 1979-11-09 1979-11-09 Preparation of optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14568579A JPS5669235A (en) 1979-11-09 1979-11-09 Preparation of optical fiber

Publications (2)

Publication Number Publication Date
JPS5669235A true JPS5669235A (en) 1981-06-10
JPS5742573B2 JPS5742573B2 (en) 1982-09-09

Family

ID=15390713

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14568579A Granted JPS5669235A (en) 1979-11-09 1979-11-09 Preparation of optical fiber

Country Status (1)

Country Link
JP (1) JPS5669235A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5815041A (en) * 1981-07-20 1983-01-28 Hitachi Ltd Production of base material for optical fiber
JPS6212628A (en) * 1985-07-05 1987-01-21 Furukawa Electric Co Ltd:The Production of optical fiber
JPH02239129A (en) * 1981-07-20 1990-09-21 Hitachi Ltd Production of optical fiber base material
US5106402A (en) * 1987-09-19 1992-04-21 U.S. Philips Corp. Method of manufacturing a monomode optical fiber

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5815041A (en) * 1981-07-20 1983-01-28 Hitachi Ltd Production of base material for optical fiber
JPH02239129A (en) * 1981-07-20 1990-09-21 Hitachi Ltd Production of optical fiber base material
JPH0243690B2 (en) * 1981-07-20 1990-10-01 Hitachi Ltd
JPH0577618B2 (en) * 1981-07-20 1993-10-27 Hitachi Ltd
JPS6212628A (en) * 1985-07-05 1987-01-21 Furukawa Electric Co Ltd:The Production of optical fiber
US5106402A (en) * 1987-09-19 1992-04-21 U.S. Philips Corp. Method of manufacturing a monomode optical fiber

Also Published As

Publication number Publication date
JPS5742573B2 (en) 1982-09-09

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