GB1473779A - Optical guides - Google Patents

Optical guides

Info

Publication number
GB1473779A
GB1473779A GB4689575A GB4689575A GB1473779A GB 1473779 A GB1473779 A GB 1473779A GB 4689575 A GB4689575 A GB 4689575A GB 4689575 A GB4689575 A GB 4689575A GB 1473779 A GB1473779 A GB 1473779A
Authority
GB
United Kingdom
Prior art keywords
core
preform
glass
refractive index
outside
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
GB4689575A
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.)
General Cable Corp
Original Assignee
General Cable 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 General Cable Corp filed Critical General Cable Corp
Publication of GB1473779A publication Critical patent/GB1473779A/en
Expired 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
    • C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • C03B37/01262—Depositing additional preform material as liquids or solutions, e.g. solution doping of preform 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
    • C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/02—Pure silica glass, e.g. pure fused quartz
    • 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
    • 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

Abstract

1473779 Glass fibre preform GENERAL CABLE CORP 13 Nov 1975 [13 Nov 1974] 46895/75 Heading C1M A preform suitable for drawing down to make an optical fibre comprises a core with a cladding of a different glass and having a radially inner part with a lower refractive index than the core and a radially outer part of higher refractive index and higher softening point than the inner part, said softening point being approximately equal to that of the core. The preform may be made by heat treating an alkali-borosilicate tube to separate the glass into a high silica phase and a low-silica acid soluble phase; leaching with HCI, H 2 SO 4 or HNO 3 ; introducing B 2 O 3 into the porous tube so that the amount thereof in the radially inner part is substantially greater than that in the outer part (e.g. by homogeneous dispersion followed by ammonia leaching from the outside or by inhomogeneous impregnating from the inside to the outside); and fusing the treated tube to a silica glass core. The preform then being drawn to a fibre. Figs. 4 and 5 of the drawings show the variation of refractive index and softening temperature over the radius of a preform from the centre of the core to the outside of the cladding for two embodiments of the invention.
GB4689575A 1974-11-13 1975-11-13 Optical guides Expired GB1473779A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US52354274A 1974-11-13 1974-11-13

Publications (1)

Publication Number Publication Date
GB1473779A true GB1473779A (en) 1977-05-18

Family

ID=24085443

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4689575A Expired GB1473779A (en) 1974-11-13 1975-11-13 Optical guides

Country Status (1)

Country Link
GB (1) GB1473779A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248614A (en) * 1979-03-19 1981-02-03 Corning Glass Works Method for drawing high-bandwidth optical waveguides
EP0158601A1 (en) * 1984-04-12 1985-10-16 Battelle Memorial Institute A method for fabricating preforms for drawn optical fibers
FR2741061A1 (en) * 1995-11-13 1997-05-16 Alcatel Fibres Optiques METHOD FOR MANUFACTURING A MONOMODE OPTICAL FIBER AND OPTICAL AMPLIFIER USING SUCH A FIBER
WO2003035564A3 (en) * 2001-10-24 2003-07-31 Inst Nat Optique Optical fibre and preform as well as their manufacture from phase-separated glass

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248614A (en) * 1979-03-19 1981-02-03 Corning Glass Works Method for drawing high-bandwidth optical waveguides
EP0158601A1 (en) * 1984-04-12 1985-10-16 Battelle Memorial Institute A method for fabricating preforms for drawn optical fibers
FR2741061A1 (en) * 1995-11-13 1997-05-16 Alcatel Fibres Optiques METHOD FOR MANUFACTURING A MONOMODE OPTICAL FIBER AND OPTICAL AMPLIFIER USING SUCH A FIBER
WO1997018169A1 (en) * 1995-11-13 1997-05-22 Alcatel Alsthom Compagnie Generale D'electricite Method for making a single-mode optical fibre and optical amplifier using said fibre
AU719124B2 (en) * 1995-11-13 2000-05-04 Alcatel Alsthom Compagnie Generale D'electricite A method of manufacturing a monomode optical fiber, and an optical amplifier using such a fiber
US6626011B2 (en) 1995-11-13 2003-09-30 Alcatel Method of manufacturing a monomode fluoride optical fiber, and an optical amplifier using such a fiber
WO2003035564A3 (en) * 2001-10-24 2003-07-31 Inst Nat Optique Optical fibre and preform as well as their manufacture from phase-separated glass
US7058269B2 (en) 2001-10-24 2006-06-06 Institut National D'optique Reconstructed glass for fiber optic applications

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Legal Events

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