JPS5447666A - Production of parent material for optical fibers - Google Patents

Production of parent material for optical fibers

Info

Publication number
JPS5447666A
JPS5447666A JP11384977A JP11384977A JPS5447666A JP S5447666 A JPS5447666 A JP S5447666A JP 11384977 A JP11384977 A JP 11384977A JP 11384977 A JP11384977 A JP 11384977A JP S5447666 A JPS5447666 A JP S5447666A
Authority
JP
Japan
Prior art keywords
core rod
deposit
sooted
outside circumference
glass raw
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
JP11384977A
Other languages
Japanese (ja)
Inventor
Seiji Shibuya
Toshiaki Kuroba
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.)
Furukawa Electric Co Ltd
Original Assignee
Furukawa Electric Co 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 Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Priority to JP11384977A priority Critical patent/JPS5447666A/en
Publication of JPS5447666A publication Critical patent/JPS5447666A/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
    • C03B37/014—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]

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 enable core rod to be readily removed without impairing the quality of the resultant fabricated product by cylindrically depositing sooted matter composed of glass raw materials on the outside circumference of the core rod and heating the core rod to allow the sooted matter to sinter and shrink. CONSTITUTION:Glass raw material powder is deposited in a sooted state by a CVD method on the outside circumference of a ocre rod 1 composed of thermally and chemically stable graphite. The core rod 1 is electro-heated by a power source 2 and the deposit 4 is heat treated from its inside circumference side to the outside circumference side. The deposit 4 becomes gradually sintered and causes volume reduc tion, thus its inside circumference shrinks in an expanding direction, whereby a minute free spacig is formed between the core rod 1 and the sintered deposit 4. When the free spacing is formed in this way, the core rod 1 is pulled off from the deposit 4.
JP11384977A 1977-09-21 1977-09-21 Production of parent material for optical fibers Pending JPS5447666A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11384977A JPS5447666A (en) 1977-09-21 1977-09-21 Production of parent material for optical fibers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11384977A JPS5447666A (en) 1977-09-21 1977-09-21 Production of parent material for optical fibers

Publications (1)

Publication Number Publication Date
JPS5447666A true JPS5447666A (en) 1979-04-14

Family

ID=14622594

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11384977A Pending JPS5447666A (en) 1977-09-21 1977-09-21 Production of parent material for optical fibers

Country Status (1)

Country Link
JP (1) JPS5447666A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4772302A (en) * 1984-12-21 1988-09-20 Northern Telecom Limited Optical waveguide manufacture
US4941905A (en) * 1986-08-29 1990-07-17 American Telephone And Telegraph Company, At&T Technologies, Inc. Methods of soot overcladding an optical preform

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4772302A (en) * 1984-12-21 1988-09-20 Northern Telecom Limited Optical waveguide manufacture
US4941905A (en) * 1986-08-29 1990-07-17 American Telephone And Telegraph Company, At&T Technologies, Inc. Methods of soot overcladding an optical preform

Similar Documents

Publication Publication Date Title
DE3071405D1 (en) Heteropolysaccharide; process and microorganism for producing it
IL55304A0 (en) Material web for the manufacture of filter rods for tobacco products and apparatus and process for producing such web
ES8502249A1 (en) High frequency induction melting furnace and method of preparing ceramic materials with such a furnace.
EP0031707A3 (en) Process for producing carbon fiber and carbon fiber so produced
ES8606211A1 (en) Process and apparatus for manufacturing optical-fibre preforms at high deposition rate.
CY1348A (en) Process for manufacturing a tube composed of a metal and plastics material, and apparatus for carrying out this process
FR2414029B1 (en) POWDER AND PROCESS FOR PRODUCING SINTERED CERAMIC
JPS5447666A (en) Production of parent material for optical fibers
GB2043624B (en) Process for the production of coated glass bodies eg waveguide preforms
GB2057423B (en) Process for the production of extremely pure amorphous glass powders
JPS5352215A (en) Machine parts consisting of hard porous sintered product and process for production thereof
JPS54151623A (en) Production of material for optical fiber
JPS5523074A (en) Production of fiber base material for light communication
JPS649830A (en) Production of preform for optical fiber
JPS57170830A (en) Manufacture of optical fiber containing ellipsoidal core
GB2009667B (en) Surface-modified cellulose acetate filaments and a process for producing the same
PT66098A (en) Process and apparatus for the production of fiber webs by melt spinning
JPS6418932A (en) Production of glass article and device therefor
JPS52156641A (en) Preparation of optical fiber
JPS53128585A (en) Vapor depositing device
PL312296A1 (en) Process for making essentially hollow cylindrical casting and essentially hollow cylindrical casting made thereby
JPS5424648A (en) Production of optical transmission wires
JPS55126596A (en) Production of single crystal
JPS5372634A (en) Nozzle for production of optical fibers
JPS5696739A (en) Preparation of optical fiber matrix