[go: up one dir, main page]

GB2002341A - Four-component glass for optical fibres - Google Patents

Four-component glass for optical fibres

Info

Publication number
GB2002341A
GB2002341A GB7828148A GB7828148A GB2002341A GB 2002341 A GB2002341 A GB 2002341A GB 7828148 A GB7828148 A GB 7828148A GB 7828148 A GB7828148 A GB 7828148A GB 2002341 A GB2002341 A GB 2002341A
Authority
GB
United Kingdom
Prior art keywords
alkaline earth
earth metal
composition
oxide
sodium
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
GB7828148A
Other versions
GB2002341B (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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Priority to GB7828148A priority Critical patent/GB2002341B/en
Publication of GB2002341A publication Critical patent/GB2002341A/en
Application granted granted Critical
Publication of GB2002341B publication Critical patent/GB2002341B/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
    • G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
    • G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
    • G02B6/03622—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 2 layers only
    • G02B6/03627—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 2 layers only arranged - +
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C13/00—Fibre or filament compositions
    • C03C13/04—Fibre optics, e.g. core and clad fibre compositions
    • C03C13/045—Silica-containing oxide glass compositions
    • C03C13/046—Multicomponent glass compositions
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Glass Compositions (AREA)

Abstract

Alkali metal borosilicate glass compositions modified by alkaline earth metal oxides are especially suitable for the production of graded index optical fibre by thermal diffusion using the double crucible method. The composition of the glass is calculated by taking a sodium borosilicate composition in region A of Fig. 1 of the drawings and replacing sodium oxide or sodium oxide and silica by alkaline earth metal oxide. Using these glasses, fibres have been produced having refractive index profiles that approximate closely to the ideal parabolic distribution, numerical apertures of up to 0.21, and best loss values as low as 6.4dB/km at 850nm. <IMAGE>
GB7828148A 1977-06-28 1978-06-28 Optical fibres and glasses Expired GB2002341B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7828148A GB2002341B (en) 1977-06-28 1978-06-28 Optical fibres and glasses

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2692477 1977-06-28
GB7828148A GB2002341B (en) 1977-06-28 1978-06-28 Optical fibres and glasses

Publications (2)

Publication Number Publication Date
GB2002341A true GB2002341A (en) 1979-02-21
GB2002341B GB2002341B (en) 1982-01-13

Family

ID=26258509

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7828148A Expired GB2002341B (en) 1977-06-28 1978-06-28 Optical fibres and glasses

Country Status (1)

Country Link
GB (1) GB2002341B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018110A1 (en) * 1979-04-04 1980-10-29 The Post Office Optical fibre core glass, optical fibres containing such glass and process for the manufacture of such glass
EP0018109A3 (en) * 1979-04-10 1981-07-15 The Post Office Improvements in or relating to graded index optical fibre
US4439008A (en) * 1981-06-26 1984-03-27 U.S. Philips Corporation Optical fiber of the graded index type and method of producing same
FR2845083A1 (en) 2002-09-30 2004-04-02 Schott Glas BOROSILICATE GLASSES WITH DETERMINED WAVELENGTH ELBOWS IN THE FIELD OF ULTRA-PURPLE

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018110A1 (en) * 1979-04-04 1980-10-29 The Post Office Optical fibre core glass, optical fibres containing such glass and process for the manufacture of such glass
US4445754A (en) * 1979-04-04 1984-05-01 Post Office Glass optical fibres and glass compositions therefor
EP0018109A3 (en) * 1979-04-10 1981-07-15 The Post Office Improvements in or relating to graded index optical fibre
US4439008A (en) * 1981-06-26 1984-03-27 U.S. Philips Corporation Optical fiber of the graded index type and method of producing same
FR2845083A1 (en) 2002-09-30 2004-04-02 Schott Glas BOROSILICATE GLASSES WITH DETERMINED WAVELENGTH ELBOWS IN THE FIELD OF ULTRA-PURPLE
DE10245880A1 (en) * 2002-09-30 2004-04-08 Schott Glas White glasses / borosilicate glasses with a special UV edge
DE10245880B4 (en) * 2002-09-30 2004-08-05 Schott Glas White glasses / borosilicate glasses with a special UV edge
US7163904B2 (en) 2002-09-30 2007-01-16 Schott Ag Colorless glasses/borosilicate glasses with special UV-edge

Also Published As

Publication number Publication date
GB2002341B (en) 1982-01-13

Similar Documents

Publication Publication Date Title
GB2083806B (en) Fabrication methods of doped silica glass and optical fibre preform by using the doped silica glass
US4094689A (en) Glass compositions
JPS57200247A (en) Glass fiber of multi-component system for optical communication
JPS5560039A (en) Optical glass
JPS55116641A (en) Optical glass
JPS5547236A (en) Production of glass fiber for light transmission
DE3071158D1 (en) Optical fibre core glass, optical fibres containing such glass and process for the manufacture of such glass
GB2002341A (en) Four-component glass for optical fibres
DE3270298D1 (en) Glasses, methods for making them, and optical fibres containing them
EP0181595A3 (en) Dielectric waveguide with chlorine dopant
JPS5547243A (en) Fluorophosphate type laser glass
JPS56121002A (en) Optical fiber for light transmission and its manufacture
JPS5487236A (en) Multi-component glass fiber for optical communication
ES469397A1 (en) Borosilicate glass
JPS5430852A (en) Production of glass fiber for optical communication
PL298004A1 (en) Alkaline silicate glass and glassware made thereform
DE3067735D1 (en) Improvements in or relating to graded index optical fibre
GB1460984A (en) Glass for multifocal spectacle glasses
JPS56160341A (en) Optical fiber
JPS5520214A (en) Optical glass for light communication
JPS5332042A (en) Preparation of glass fiber of multi-ingredient system
JPS5448566A (en) Production of fiber parent material for optical communication
JPS5346742A (en) Production of optical fiber
JPS53134450A (en) Production of optical fiber
JPS5738344A (en) Preform for optical fiber transmitting infrared ray

Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950628