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JPS56125233A - Manufacture of optical fiber - Google Patents

Manufacture of optical fiber

Info

Publication number
JPS56125233A
JPS56125233A JP2814980A JP2814980A JPS56125233A JP S56125233 A JPS56125233 A JP S56125233A JP 2814980 A JP2814980 A JP 2814980A JP 2814980 A JP2814980 A JP 2814980A JP S56125233 A JPS56125233 A JP S56125233A
Authority
JP
Japan
Prior art keywords
tube
rod
heating
core
optical 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
JP2814980A
Other languages
Japanese (ja)
Other versions
JPS6350291B2 (en
Inventor
Hiroyoshi Matsumura
Toshio Katsuyama
Yasuo Suganuma
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 JP2814980A priority Critical patent/JPS56125233A/en
Priority to EP83111109A priority patent/EP0109604B1/en
Priority to DE8181100130T priority patent/DE3176131D1/en
Priority to DE8383111109T priority patent/DE3177109D1/en
Priority to EP81100130A priority patent/EP0032390B1/en
Priority to US06/223,747 priority patent/US4426129A/en
Publication of JPS56125233A publication Critical patent/JPS56125233A/en
Publication of JPS6350291B2 publication Critical patent/JPS6350291B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

PURPOSE:To obtain an optical fiber composed of a core having desired elliptic shape and a clad having nearly circular circumference, by heating and collapsing a part of a thin-walled glass tube to make a solid rod, and heating the solid rod under definite reduced pressure while shifting the heating spot of the rod to obtain a preform rod. CONSTITUTION:A quartz tube is heated to reduce its radius and ticken its wall thickness. A thin glass layer (e.g. composed of 30mol% of GeO2 and 70mol% of SiO2 and having a thickness of 10mum) which forms a core is deposited to the inner wall of the tube by chemical deposition. The both ends of the glass tube thus prepared are attached to a glass lathe, and a part of the tube 1 is heated with an oxyhydrogen burner 2 and collapsed. One open end of the glass tube is connected to a vacuum tank 4, and the tube is evacuated to a definite pressure by controlling the vacuum control valve 6. A solid preform rod is obtained by shifting the oxyhydrogen burner 2 at a constant speed rotating the quartz tube at a constant rate. An optical fiber obtained by heating and drawing the preform rod thus obtained, has a core having nearly similar elliptic shape to the shape before drawing and an essentially circular circumference having an ellipticity of no more than 1-2% regardless of its original shape.
JP2814980A 1980-01-11 1980-03-07 Manufacture of optical fiber Granted JPS56125233A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2814980A JPS56125233A (en) 1980-03-07 1980-03-07 Manufacture of optical fiber
EP83111109A EP0109604B1 (en) 1980-01-11 1981-01-09 Polarised plane-maintaining optical fiber
DE8181100130T DE3176131D1 (en) 1980-01-11 1981-01-09 Method of producing a preform rod for an optical fiber
DE8383111109T DE3177109D1 (en) 1980-01-11 1981-01-09 Polarised plane-maintaining optical fiber
EP81100130A EP0032390B1 (en) 1980-01-11 1981-01-09 Method of producing a preform rod for an optical fiber
US06/223,747 US4426129A (en) 1980-01-11 1981-01-09 Optical fiber and method of producing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2814980A JPS56125233A (en) 1980-03-07 1980-03-07 Manufacture of optical fiber

Publications (2)

Publication Number Publication Date
JPS56125233A true JPS56125233A (en) 1981-10-01
JPS6350291B2 JPS6350291B2 (en) 1988-10-07

Family

ID=12240700

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2814980A Granted JPS56125233A (en) 1980-01-11 1980-03-07 Manufacture of optical fiber

Country Status (1)

Country Link
JP (1) JPS56125233A (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
JP2012162409A (en) * 2011-02-03 2012-08-30 Sumitomo Electric Ind Ltd Method for producing optical fiber preform

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
JP2012162409A (en) * 2011-02-03 2012-08-30 Sumitomo Electric Ind Ltd Method for producing optical fiber preform

Also Published As

Publication number Publication date
JPS6350291B2 (en) 1988-10-07

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