JPS5641848A - Manufacture of optical fiber base material - Google Patents

Manufacture of optical fiber base material

Info

Publication number
JPS5641848A
JPS5641848A JP11709779A JP11709779A JPS5641848A JP S5641848 A JPS5641848 A JP S5641848A JP 11709779 A JP11709779 A JP 11709779A JP 11709779 A JP11709779 A JP 11709779A JP S5641848 A JPS5641848 A JP S5641848A
Authority
JP
Japan
Prior art keywords
glass
pipe
temp
optical fiber
base material
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
JP11709779A
Other languages
Japanese (ja)
Inventor
Motohiro Nakahara
Toru Kuwabara
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.)
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries 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 Nippon Telegraph and Telephone Corp, Sumitomo Electric Industries Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP11709779A priority Critical patent/JPS5641848A/en
Publication of JPS5641848A publication Critical patent/JPS5641848A/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
    • C03B37/012—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
    • 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

Abstract

PURPOSE:To obtain an optical fiber base material causing no scattering loss after drawing by putting core glass into a high purity quartz pipe, heating them while feeding a clean gas into the gap been them, and melting and uniting them. CONSTITUTION:Cleaned core glass 1 is put into quartz pipe 2 obtd. by depositing high purity quartz glass or pure quartz pipe 2, and they are arranged coaxially with spacer 5. While feeding clean gas 3 such as N2 or Ar into the gap between them, they are heated at a temp. below the softening point of glass 1 with high temp. flame 4 from the outside of pipe 2, whereby constituents of the outside of glass 1 and the inside of pipe 2 are volatilized, and foreign matter and surface flaws are removed to clean and flatten glass 1 and pipe 2. The feed of gas 3 is then stopped, and by further raising the temp., glass 1 and pipe 2 are melted and united.
JP11709779A 1979-09-12 1979-09-12 Manufacture of optical fiber base material Pending JPS5641848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11709779A JPS5641848A (en) 1979-09-12 1979-09-12 Manufacture of optical fiber base material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11709779A JPS5641848A (en) 1979-09-12 1979-09-12 Manufacture of optical fiber base material

Publications (1)

Publication Number Publication Date
JPS5641848A true JPS5641848A (en) 1981-04-18

Family

ID=14703315

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11709779A Pending JPS5641848A (en) 1979-09-12 1979-09-12 Manufacture of optical fiber base material

Country Status (1)

Country Link
JP (1) JPS5641848A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61117126A (en) * 1984-11-13 1986-06-04 Sumitomo Electric Ind Ltd Preparation of parent material for optical fiber
US4974424A (en) * 1986-02-04 1990-12-04 Kawasaki Steel Corp. Method and system for cooling strip

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5220042A (en) * 1975-08-08 1977-02-15 Sumitomo Electric Ind Ltd Process for fabricating a preform capable of transmitting light
JPS53141994A (en) * 1977-05-17 1978-12-11 Sumitomo Electric Ind Ltd Method of grinding inner surface of glass tube

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5220042A (en) * 1975-08-08 1977-02-15 Sumitomo Electric Ind Ltd Process for fabricating a preform capable of transmitting light
JPS53141994A (en) * 1977-05-17 1978-12-11 Sumitomo Electric Ind Ltd Method of grinding inner surface of glass tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61117126A (en) * 1984-11-13 1986-06-04 Sumitomo Electric Ind Ltd Preparation of parent material for optical fiber
JPH0134938B2 (en) * 1984-11-13 1989-07-21 Sumitomo Electric Industries
US4974424A (en) * 1986-02-04 1990-12-04 Kawasaki Steel Corp. Method and system for cooling strip

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