GB2004863A - Gradient index optical waveguide - Google Patents

Gradient index optical waveguide

Info

Publication number
GB2004863A
GB2004863A GB7837796A GB7837796A GB2004863A GB 2004863 A GB2004863 A GB 2004863A GB 7837796 A GB7837796 A GB 7837796A GB 7837796 A GB7837796 A GB 7837796A GB 2004863 A GB2004863 A GB 2004863A
Authority
GB
United Kingdom
Prior art keywords
thermal expansion
preform
dopant
concentration
expansion coefficient
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
GB7837796A
Other versions
GB2004863B (en
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.)
Corning Glass Works
Original Assignee
Corning Glass Works
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 Corning Glass Works filed Critical Corning Glass Works
Publication of GB2004863A publication Critical patent/GB2004863A/en
Application granted granted Critical
Publication of GB2004863B publication Critical patent/GB2004863B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
    • G02B6/0281—Graded index region forming part of the central core segment, e.g. alpha profile, triangular, trapezoidal core
    • 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]
    • C03B37/01413—Reactant delivery systems
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/08—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant
    • C03B2201/10—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant doped with boron
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
    • C03B2201/31—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with germanium
    • 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
    • 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
    • C03B2203/225—Matching coefficients of thermal expansion [CTE] of glass layers
    • 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
    • C03B2207/80—Feeding the burner or the burner-heated deposition site
    • C03B2207/85—Feeding the burner or the burner-heated deposition site with vapour generated from liquid glass precursors, e.g. directly by heating the liquid
    • C03B2207/86—Feeding the burner or the burner-heated deposition site with vapour generated from liquid glass precursors, e.g. directly by heating the liquid by bubbling a gas through the liquid

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Optical Integrated Circuits (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

In the method of making a preform for a high numerical aperture gradient index optical waveguide, the concentrations of two dopant constituents are changed during fabrication. Concentration of the first dopant, e.g. GeO2 is changed radically as the preform is built up in order to produce the desired radical refractive index gradient. The concentration of the second dopant, e.g. B2O3 is changed radically to compensate for the radial change in thermal expansion coefficient caused by the varying GeO2 concentration. B2O3 may be added to an outer cladding layer to make the thermal expansion coefficient of the cladding equal to or greater than the composite thermal expansion coefficient of the gradient index core. The magnitude of residual tension at the inner surface caused by thermal expansion gradients is reduced and premature cracking of the preform is eliminated.
GB7837796A 1977-09-29 1978-09-22 Gradient index optical waveguide Expired GB2004863B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83792777A 1977-09-29 1977-09-29

Publications (2)

Publication Number Publication Date
GB2004863A true GB2004863A (en) 1979-04-11
GB2004863B GB2004863B (en) 1982-05-26

Family

ID=25275810

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7837796A Expired GB2004863B (en) 1977-09-29 1978-09-22 Gradient index optical waveguide

Country Status (9)

Country Link
JP (2) JPS5464134A (en)
AT (1) AT388725B (en)
BR (1) BR7805597A (en)
CA (1) CA1117334A (en)
DE (1) DE2841909B2 (en)
FR (1) FR2404864A1 (en)
GB (1) GB2004863B (en)
IT (1) IT1099618B (en)
NL (1) NL174137C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS573734A (en) * 1980-05-01 1982-01-09 Corning Glass Works Tin preform for light-conducting path and formation thereof
EP0697605A3 (en) * 1994-08-16 1998-02-04 AT&T Corp. Optical device with substrate and waveguide structure having thermal matching interfaces

Families Citing this family (2)

* 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
DE102011109838A1 (en) 2011-05-27 2012-11-29 J-Plasma Gmbh optical fiber

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50110341A (en) * 1974-02-07 1975-08-30
US4339173A (en) * 1975-09-08 1982-07-13 Corning Glass Works Optical waveguide containing P2 O5 and GeO2
JPS5288349A (en) * 1976-01-20 1977-07-23 Nippon Selfoc Co Ltd Optical fiber for communication
DE2615534C3 (en) * 1976-04-09 1978-10-05 Jenaer Glaswerk Schott & Gen., 6500 Mainz Optical fiber suitable for the transmission of messages with a gradient profile made of multi-component glasses with an adapted expansion coefficient between the glass core and the glass cladding, as well as a process for their production

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS573734A (en) * 1980-05-01 1982-01-09 Corning Glass Works Tin preform for light-conducting path and formation thereof
JPH0244777B2 (en) * 1980-05-01 1990-10-05 Corning Glass Works
EP0697605A3 (en) * 1994-08-16 1998-02-04 AT&T Corp. Optical device with substrate and waveguide structure having thermal matching interfaces

Also Published As

Publication number Publication date
NL7809849A (en) 1979-04-02
IT7828261A0 (en) 1978-09-29
FR2404864B1 (en) 1984-04-06
JPS5464134A (en) 1979-05-23
AT388725B (en) 1989-08-25
JPS6216904U (en) 1987-01-31
NL174137B (en) 1983-12-01
IT1099618B (en) 1985-09-18
FR2404864A1 (en) 1979-04-27
GB2004863B (en) 1982-05-26
NL174137C (en) 1987-05-18
ATA701778A (en) 1986-08-15
CA1117334A (en) 1982-02-02
BR7805597A (en) 1979-06-05
DE2841909B2 (en) 1981-04-23
DE2841909A1 (en) 1979-04-05

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee