GB1507711A - Glass for use in dielectric optical waveguides - Google Patents

Glass for use in dielectric optical waveguides

Info

Publication number
GB1507711A
GB1507711A GB3348474A GB3348474A GB1507711A GB 1507711 A GB1507711 A GB 1507711A GB 3348474 A GB3348474 A GB 3348474A GB 3348474 A GB3348474 A GB 3348474A GB 1507711 A GB1507711 A GB 1507711A
Authority
GB
United Kingdom
Prior art keywords
glass
july
hours
weight
dielectric optical
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.)
Expired
Application number
GB3348474A
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 GB3348474A priority Critical patent/GB1507711A/en
Priority to JP13037274A priority patent/JPS545807B2/ja
Priority to DE19742454293 priority patent/DE2454293C3/en
Priority to US05/571,529 priority patent/US3957342A/en
Priority to CA231,987A priority patent/CA1047245A/en
Priority to AU83323/75A priority patent/AU496487B2/en
Priority to NL7508945A priority patent/NL7508945A/en
Priority to FR7523686A priority patent/FR2280595A1/en
Priority to US05/656,271 priority patent/US4023952A/en
Publication of GB1507711A publication Critical patent/GB1507711A/en
Priority to CA312,789A priority patent/CA1059310A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/18—Stirring devices; Homogenisation
    • C03B5/193—Stirring devices; Homogenisation using gas, e.g. bubblers
    • 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

Landscapes

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

Abstract

1507711 Sodium borosilicate glass POST OFFICE 14 July 1975 [29 July 1974 9 Dec 1974 24 Jan 1975] 33484/74 53097/74 and 3306/75 Heading C1M A sodium borosilicate glass has a composition comprising 95-99À99% by weight of a mixture of Na 2 O. B 2 O 3 and SiO 2 in a ratio lying within Region A of Figure 1, the glass also comprising 0À01-5% by weight of a redox buffering oxide (e.g. As 2 O 3 or Sb 2 O 3 ). The glass may be used to form the core and/or cladding of a dielectric optical waveguide, the waveguide preferably being made using a double crucible apparatus. In making the glass, the batch materials may be heated to 250‹C. in vacuo (to reduce the hydroxyl group content of the glass) and then melted, and then the melt held at 800-1400‹C. for ¢-2 hours while a dry reducing gas is bubbled therethrough (to achieve an optimum redox state). The reducing gas preferably consists of 80-100% (by volume) CO 2 and 0-20% CO. The melt is subsequently fired for up to 40 hours (e.g. in dry air, CO 2 or N 2 ). Specification 1.507,712 is referred to.
GB3348474A 1974-07-29 1974-07-29 Glass for use in dielectric optical waveguides Expired GB1507711A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
GB3348474A GB1507711A (en) 1974-07-29 1974-07-29 Glass for use in dielectric optical waveguides
JP13037274A JPS545807B2 (en) 1974-07-29 1974-11-12
DE19742454293 DE2454293C3 (en) 1974-07-29 1974-11-15 Na ↓ 2 ↓ O-B ↓ 2 ↓ O ↓ 3 ↓ -SiO ↓ 2 ↓ -Glass for making dielectric optical waveguide, method for making it, and using it
US05/571,529 US3957342A (en) 1974-07-29 1975-04-25 Sodium borosilicate glasses for dielectric optical waveguides
CA231,987A CA1047245A (en) 1974-07-29 1975-07-22 Dielectric optical waveguides
AU83323/75A AU496487B2 (en) 1975-07-23 Improvements in or relating to dielectric optical waveguides
NL7508945A NL7508945A (en) 1974-07-29 1975-07-28 PROCEDURE FOR MANUFACTURE OF OPTICAL WAVE GUIDES, PROCEDURE FOR PREPARING THE GLASS USED IN THIS AND ARTICLES MADE.
FR7523686A FR2280595A1 (en) 1974-07-29 1975-07-29 IMPROVEMENTS IN GLASSES FOR DIELECTRIC GUIDES OF OPTICAL WAVES AND THEIR MANUFACTURING PROCESSES
US05/656,271 US4023952A (en) 1974-07-29 1976-02-09 Making a dielectric optical waveguide glass
CA312,789A CA1059310A (en) 1974-07-29 1978-10-05 Dielectric optical waveguides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3348474A GB1507711A (en) 1974-07-29 1974-07-29 Glass for use in dielectric optical waveguides

Publications (1)

Publication Number Publication Date
GB1507711A true GB1507711A (en) 1978-04-19

Family

ID=10353566

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3348474A Expired GB1507711A (en) 1974-07-29 1974-07-29 Glass for use in dielectric optical waveguides

Country Status (3)

Country Link
JP (1) JPS545807B2 (en)
DE (1) DE2454293C3 (en)
GB (1) GB1507711A (en)

Cited By (1)

* 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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5170209A (en) * 1974-12-14 1976-06-17 Nippon Sheet Glass Co Ltd Kotomeigarasuo seizosuru hoho
WO2007052489A1 (en) * 2005-10-31 2007-05-10 Ohara Inc. Optical glass, apparatus for producing optical glass, and process for producing the same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1449793A (en) * 1920-11-29 1923-03-27 Corning Glass Works Glass and process of making same
US2221709A (en) * 1938-01-29 1940-11-12 Corning Glass Works Borosilicate glass
US3495964A (en) * 1967-05-11 1970-02-17 Corning Glass Works Method of making bluish-green borosilicate glasses
JPS4929653A (en) * 1972-07-12 1974-03-16
JPS5722900B2 (en) * 1972-07-12 1982-05-15

Cited By (2)

* 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

Also Published As

Publication number Publication date
DE2454293A1 (en) 1976-02-12
DE2454293C3 (en) 1985-12-05
JPS5114915A (en) 1976-02-05
JPS545807B2 (en) 1979-03-22
DE2454293B2 (en) 1980-06-12

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19950713