JPS5742552A - Preparation of base material for optical fiber - Google Patents

Preparation of base material for optical fiber

Info

Publication number
JPS5742552A
JPS5742552A JP11952480A JP11952480A JPS5742552A JP S5742552 A JPS5742552 A JP S5742552A JP 11952480 A JP11952480 A JP 11952480A JP 11952480 A JP11952480 A JP 11952480A JP S5742552 A JPS5742552 A JP S5742552A
Authority
JP
Japan
Prior art keywords
raw material
glass tube
feeding system
attached
material feeding
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
JP11952480A
Other languages
Japanese (ja)
Inventor
Hisao Takada
Hiroshi Takahashi
Shintaro Izutsui
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
Nippon Telegraph and Telephone Corp
Original Assignee
Furukawa Electric Co 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 Furukawa Electric Co Ltd, Nippon Telegraph and Telephone Corp filed Critical Furukawa Electric Co Ltd
Priority to JP11952480A priority Critical patent/JPS5742552A/en
Publication of JPS5742552A publication Critical patent/JPS5742552A/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]
    • 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
    • C03B37/01807—Reactant delivery systems, e.g. reactant deposition burners
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/10—Internal structure or shape details
    • C03B2203/22—Radial profile of refractive index, composition or softening point
    • C03B2203/26—Parabolic or graded index [GRIN] core profile
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2207/00—Glass deposition burners
    • C03B2207/70—Control measures
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2207/00—Glass deposition burners
    • C03B2207/80—Feeding the burner or the burner-heated deposition site

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 make it possible to obtain a base material for an optical fiber having constant refractive index characteristics always, by feeding results obtained from the X-ray analysis of a material attached to the inner wall of a glass tube by the internal CVD (modified chemical vapor deposition) method back to a raw material feeding system, and controlling the feeding source. CONSTITUTION:An oxide of glass powder containing a dopant is deposited on the inner surface of a glass tube 1. In vitrifying the oxide, a gaseous phase raw material of a given composition is blown from a raw material feeding system 3 through the glass tube 1 into a gas expelling system 4, and a burner 5 jetting an oxyhydrogen flame is reciprocated in the long direction of the glass tube 1 to heat the interior thereof. Thus, an attached material 6 which is a reaction product of the raw material is formed. In this case, X rays are irradiated by the scanning method from an X-ray generating source 7 to the glass tube 1 and caught by an X-ray sensor 8 containing an electric measuring mechanism and analyzed. After sensing with the X-ray sensor 8, the analytical results are recorded on a recorder 12 through an amplifier 11, and the results are fed to a control apparatus 13 of the raw material feeding system 3. The raw material feeding system 3 is controlled to adjust the refractive index distribution of the material attached to the inner surface of the glass tube 1 to the desired state.
JP11952480A 1980-08-29 1980-08-29 Preparation of base material for optical fiber Pending JPS5742552A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11952480A JPS5742552A (en) 1980-08-29 1980-08-29 Preparation of base material for optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11952480A JPS5742552A (en) 1980-08-29 1980-08-29 Preparation of base material for optical fiber

Publications (1)

Publication Number Publication Date
JPS5742552A true JPS5742552A (en) 1982-03-10

Family

ID=14763404

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11952480A Pending JPS5742552A (en) 1980-08-29 1980-08-29 Preparation of base material for optical fiber

Country Status (1)

Country Link
JP (1) JPS5742552A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5435044A (en) * 1993-04-16 1995-07-25 Yoshida Kogyo K.K. Cord tightening device
NL1013944C2 (en) * 1999-12-23 2001-06-26 Plasma Optical Fibre Bv A method of manufacturing a preform with a precisely defined refractive index profile by means of a chemical vapor deposition (CVD) technique.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5435044A (en) * 1993-04-16 1995-07-25 Yoshida Kogyo K.K. Cord tightening device
NL1013944C2 (en) * 1999-12-23 2001-06-26 Plasma Optical Fibre Bv A method of manufacturing a preform with a precisely defined refractive index profile by means of a chemical vapor deposition (CVD) technique.
EP1110919A1 (en) * 1999-12-23 2001-06-27 Plasma Optical Fibre B.V. Method of manufacturing an optical fibre preform by chemical vapour deposition
JP2001220151A (en) * 1999-12-23 2001-08-14 Plasma Optical Fibre Bv Method of producing preform exactly exhibiting prescribed profile of refractive index by chemical vapor deposition(cvd)
US6574993B2 (en) 1999-12-23 2003-06-10 Plasma Optical Fibre B.V. Method of manufacturing a preform exhibiting a precisely defined refractive index profile by means of a chemical vapor deposition (CVD) technique

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