JPS54160826A - Fiber for optical communication - Google Patents

Fiber for optical communication

Info

Publication number
JPS54160826A
JPS54160826A JP6833378A JP6833378A JPS54160826A JP S54160826 A JPS54160826 A JP S54160826A JP 6833378 A JP6833378 A JP 6833378A JP 6833378 A JP6833378 A JP 6833378A JP S54160826 A JPS54160826 A JP S54160826A
Authority
JP
Japan
Prior art keywords
core
intermediate layer
clad
curve
fiber
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
JP6833378A
Other languages
Japanese (ja)
Other versions
JPS5637522B2 (en
Inventor
Akio Kawana
Ryozo Yamauchi
Koichi Inada
Sadao Chigira
Hirokazu Hashimoto
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 JP6833378A priority Critical patent/JPS54160826A/en
Publication of JPS54160826A publication Critical patent/JPS54160826A/en
Publication of JPS5637522B2 publication Critical patent/JPS5637522B2/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
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres

Landscapes

  • Engineering & Computer Science (AREA)
  • 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)
  • Glass Compositions (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

PURPOSE:The intermediate layer of glass with a higher viscosity than those of the core and clad layers at the spinning temperature is provided between the core and clad to prevent the local deformation in the core caused by bubbles emerging during the spinning, thus reducing the transmission loss. CONSTITUTION:Between core 10 and clad 20 is provided intermediate layer 50, which is made of SiO2 glass with a higher viscosity than those of the core and clad at the spinning temperature and has about 3 mum thickness. The provision of the intermediate layer 50 blocks the pressure caused by the expansion of bubble 40, thus reduces the deformation of core 10. The characteristics of transmission loss versus wave length is given as curve A, which is lower than curve B for a conventional fiber not provided with an intermediate layer.
JP6833378A 1978-06-08 1978-06-08 Fiber for optical communication Granted JPS54160826A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6833378A JPS54160826A (en) 1978-06-08 1978-06-08 Fiber for optical communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6833378A JPS54160826A (en) 1978-06-08 1978-06-08 Fiber for optical communication

Publications (2)

Publication Number Publication Date
JPS54160826A true JPS54160826A (en) 1979-12-19
JPS5637522B2 JPS5637522B2 (en) 1981-09-01

Family

ID=13370796

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6833378A Granted JPS54160826A (en) 1978-06-08 1978-06-08 Fiber for optical communication

Country Status (1)

Country Link
JP (1) JPS54160826A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041864A2 (en) * 1980-06-09 1981-12-16 Corning Glass Works Long wavelength, low-loss optical waveguide
EP0044712A2 (en) * 1980-07-17 1982-01-27 BRITISH TELECOMMUNICATIONS public limited company Improvements in and relating to glass fibres for optical communication
JPS6246932A (en) * 1985-08-23 1987-02-28 Sumitomo Electric Ind Ltd Production of preform for optical fiber

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5961210A (en) * 1982-09-29 1984-04-07 Kinseki Kk Structure of metallic film of crystal oscillator
JPS63316912A (en) * 1987-06-19 1988-12-26 Nippon Dempa Kogyo Co Ltd Piezoelectric vibrator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041864A2 (en) * 1980-06-09 1981-12-16 Corning Glass Works Long wavelength, low-loss optical waveguide
EP0044712A2 (en) * 1980-07-17 1982-01-27 BRITISH TELECOMMUNICATIONS public limited company Improvements in and relating to glass fibres for optical communication
EP0154026A2 (en) * 1980-07-17 1985-09-11 BRITISH TELECOMMUNICATIONS public limited company A monomode optical fibre and a method of manufacture
EP0044712B1 (en) * 1980-07-17 1989-08-23 BRITISH TELECOMMUNICATIONS public limited company Improvements in and relating to glass fibres for optical communication
JPS6246932A (en) * 1985-08-23 1987-02-28 Sumitomo Electric Ind Ltd Production of preform for optical fiber

Also Published As

Publication number Publication date
JPS5637522B2 (en) 1981-09-01

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