JPS56125234A - Manufacture of optical fiber - Google Patents

Manufacture of optical fiber

Info

Publication number
JPS56125234A
JPS56125234A JP6175080A JP6175080A JPS56125234A JP S56125234 A JPS56125234 A JP S56125234A JP 6175080 A JP6175080 A JP 6175080A JP 6175080 A JP6175080 A JP 6175080A JP S56125234 A JPS56125234 A JP S56125234A
Authority
JP
Japan
Prior art keywords
tube
glass tube
glass
optical fiber
pressure
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
JP6175080A
Other languages
Japanese (ja)
Other versions
JPS5920612B2 (en
Inventor
Katsuyuki Imoto
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 Ltd
Original Assignee
Hitachi 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 Ltd filed Critical Hitachi Ltd
Priority to JP6175080A priority Critical patent/JPS5920612B2/en
Publication of JPS56125234A publication Critical patent/JPS56125234A/en
Publication of JPS5920612B2 publication Critical patent/JPS5920612B2/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]
    • C03B37/018—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
    • C03B37/01861—Means for changing or stabilising the diameter or form of tubes or rods

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General 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 manufacture a precisely circular preform rod, in high reproducibility, by heating a glass tube with an oxyhydrogen burner applying a specific pressure to the tube, and compressing and collapsing the tube. CONSTITUTION:A glass layer is deposited to the inner wall of a glass tube, one end of the tube is closed, and the tube is heated and sintered under introduction of gas from the other end into the tube to obtain an optical fiber preform rod. In the above process, the glass tube is held vertically and the revolution of the main axis is kept to zero, or the external pressure P and the inner pressure P1 of the glass tube are selected to satisfy the equation II (g is the acceleration of gravity, 1/m is Poisson's ratio, w is weight of the unit volume of the glass tube, omega is angular velocity of the glass tube, 2r1 is inner diameter of the glass tube, and 2r2 is outer diameter of the tube), keeping the conditions of the equation I. By this process, the radial stress is exerted to the tube by the inner pressure, and the tangential stress caused by inner pressure and the circumferential stress caused by centrifugal force are applied to the tube, whereby an optical fiber having precisely circular core and outer circumference can be obtained.
JP6175080A 1980-05-12 1980-05-12 Optical fiber manufacturing method Expired JPS5920612B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6175080A JPS5920612B2 (en) 1980-05-12 1980-05-12 Optical fiber manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6175080A JPS5920612B2 (en) 1980-05-12 1980-05-12 Optical fiber manufacturing method

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP12331475A Division JPS5248329A (en) 1975-10-15 1975-10-15 Method for preparation of optical fibers

Publications (2)

Publication Number Publication Date
JPS56125234A true JPS56125234A (en) 1981-10-01
JPS5920612B2 JPS5920612B2 (en) 1984-05-14

Family

ID=13180145

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6175080A Expired JPS5920612B2 (en) 1980-05-12 1980-05-12 Optical fiber manufacturing method

Country Status (1)

Country Link
JP (1) JPS5920612B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1535091A1 (en) * 2002-09-03 2005-06-01 LG Cable Ltd. Method for making optical fiber preform having ultimately low pmd through improvement of ovality

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1535091A1 (en) * 2002-09-03 2005-06-01 LG Cable Ltd. Method for making optical fiber preform having ultimately low pmd through improvement of ovality
EP1535091A4 (en) * 2002-09-03 2006-03-01 Lg Cable Ltd Method for making optical fiber preform having ultimately low pmd through improvement of ovality

Also Published As

Publication number Publication date
JPS5920612B2 (en) 1984-05-14

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