FR2307639A1 - Optical fibres with low attenuation - drawn from fused silica blank contg. multilayer core of doped silica and flux (NL191076) - Google Patents

Optical fibres with low attenuation - drawn from fused silica blank contg. multilayer core of doped silica and flux (NL191076)

Info

Publication number
FR2307639A1
FR2307639A1 FR7611487A FR7611487A FR2307639A1 FR 2307639 A1 FR2307639 A1 FR 2307639A1 FR 7611487 A FR7611487 A FR 7611487A FR 7611487 A FR7611487 A FR 7611487A FR 2307639 A1 FR2307639 A1 FR 2307639A1
Authority
FR
France
Prior art keywords
flux
drawn
tube
low attenuation
contg
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.)
Withdrawn
Application number
FR7611487A
Other languages
French (fr)
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom 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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of FR2307639A1 publication Critical patent/FR2307639A1/en
Withdrawn legal-status Critical Current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
    • C03B37/01861—Means for changing or stabilising the diameter or form of tubes or rods
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Glass Compositions (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

In the mfr. of an optical fibre using a round quartz tube, a vapour mixt. is formed from O2, SiCl4, a dopant and a flux and fed through the tube which is zone heated to form a deposit adjacent to the moving hot zone; the deposit is then melted to form a layer in which the dopant produces a higher refractive index (R2) than that of the tube, the flux lowering the m.pt. of the layer; the process is repeated to form several layers and the tube is then heated above its softening point so it collapses, forming a bar which is drawn into an optical fibre. The amt. of dopant is pref. altered to form a sequence of layers with progressively increasing RI. Used of fibres with low attenuation due to a substantial redn. in scattering centres and Rayleigh scattering.
FR7611487A 1975-04-16 1976-04-16 Optical fibres with low attenuation - drawn from fused silica blank contg. multilayer core of doped silica and flux (NL191076) Withdrawn FR2307639A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA224,768A CA1034818A (en) 1975-04-16 1975-04-16 Manufacture of optical fibres

Publications (1)

Publication Number Publication Date
FR2307639A1 true FR2307639A1 (en) 1976-11-12

Family

ID=4102827

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7611487A Withdrawn FR2307639A1 (en) 1975-04-16 1976-04-16 Optical fibres with low attenuation - drawn from fused silica blank contg. multilayer core of doped silica and flux (NL191076)

Country Status (8)

Country Link
JP (1) JPS51127744A (en)
CA (1) CA1034818A (en)
DE (1) DE2616096A1 (en)
ES (1) ES447071A1 (en)
FR (1) FR2307639A1 (en)
IT (1) IT1059073B (en)
NL (1) NL7603845A (en)
SE (1) SE7604424L (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2368051A1 (en) * 1976-10-12 1978-05-12 Western Electric Co OPTICAL FIBER
FR2379826A1 (en) * 1977-02-02 1978-09-01 Hitachi Ltd OPTICAL FIBER AND ITS MANUFACTURING PROCESS
FR2421850A1 (en) * 1978-04-04 1979-11-02 Jenaer Glaswerk Schott & Gen METHOD OF MANUFACTURING OPTICAL FIBERS FOR THE TRANSMISSION OF INFORMATION
FR2433493A1 (en) * 1978-07-31 1980-03-14 Nippon Telegraph & Telephone LOW LOSS AND BROADBAND OPTICAL FIBER

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4314837A (en) * 1979-03-01 1982-02-09 Corning Glass Works Reactant delivery system method
EP0154026B1 (en) * 1980-07-17 1988-09-07 BRITISH TELECOMMUNICATIONS public limited company A monomode optical fibre and a method of manufacture
CA1170876A (en) * 1980-12-29 1984-07-17 Koichi Abe Fiber with coarse index gradient
JPS60215550A (en) * 1984-04-12 1985-10-28 Sumitomo Electric Ind Ltd Quartz based glass fiber for optical transmission containing fluorine and p2o5

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3826560A (en) * 1972-03-30 1974-07-30 Corning Glass Works Method of forming a light focusing fiber waveguide
JPS5239294B2 (en) * 1972-04-27 1977-10-04

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2368051A1 (en) * 1976-10-12 1978-05-12 Western Electric Co OPTICAL FIBER
FR2379826A1 (en) * 1977-02-02 1978-09-01 Hitachi Ltd OPTICAL FIBER AND ITS MANUFACTURING PROCESS
FR2421850A1 (en) * 1978-04-04 1979-11-02 Jenaer Glaswerk Schott & Gen METHOD OF MANUFACTURING OPTICAL FIBERS FOR THE TRANSMISSION OF INFORMATION
FR2433493A1 (en) * 1978-07-31 1980-03-14 Nippon Telegraph & Telephone LOW LOSS AND BROADBAND OPTICAL FIBER

Also Published As

Publication number Publication date
DE2616096A1 (en) 1976-10-28
JPS51127744A (en) 1976-11-08
IT1059073B (en) 1982-05-31
SE7604424L (en) 1976-10-17
CA1034818A (en) 1978-07-18
ES447071A1 (en) 1977-10-01
NL7603845A (en) 1976-10-19

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Legal Events

Date Code Title Description
ST Notification of lapse