IN2014DE03398A - - Google Patents

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Publication number
IN2014DE03398A
IN2014DE03398A IN3398DE2014A IN2014DE03398A IN 2014DE03398 A IN2014DE03398 A IN 2014DE03398A IN 3398DE2014 A IN3398DE2014 A IN 3398DE2014A IN 2014DE03398 A IN2014DE03398 A IN 2014DE03398A
Authority
IN
India
Prior art keywords
silica glass
core rod
added
core
dopant
Prior art date
Application number
Inventor
Dai Inoue
Hiroshi Oyamada
Original Assignee
Shinetsu Chemical Co
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 Shinetsu Chemical Co filed Critical Shinetsu Chemical Co
Publication of IN2014DE03398A publication Critical patent/IN2014DE03398A/en

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]
    • C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
    • C03B37/01453—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering for doping the preform with flourine
    • 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
    • C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
    • C03B37/01228—Removal of preform material
    • 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
    • C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
    • C03B37/0124—Means for reducing the diameter of rods or tubes by drawing, e.g. for preform draw-down
    • 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
    • C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
    • C03B37/0124—Means for reducing the diameter of rods or tubes by drawing, e.g. for preform draw-down
    • C03B37/01245—Means for reducing the diameter of rods or tubes by drawing, e.g. for preform draw-down by drawing and collapsing
    • 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]
    • C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
    • 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]
    • C03B37/01466—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
    • 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
    • C03B2201/12—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant doped with fluorine
    • 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
    • C03B2203/23—Double or multiple optical cladding profiles
    • 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
    • G02B6/0283—Graded index region external to the central core segment, e.g. sloping layer or triangular or trapezoidal layer
    • 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
    • G02B6/03638—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 3 layers only
    • G02B6/0365—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 3 layers only arranged - - +

Abstract

A method for producing a silica glass preform for an optical fiber includes processes for producing a silica glass soot body having a core portion added with a positive dopant and an intermediate portion having a refractive index lower than that of the core portion, heating the silica glass soot body at a temperature for transparently vitrifying the soot body in a helium atmosphere containing a negative dopant raw material and forming a first core rod having the intermediate portion to at least a portion of which a negative dopant is added, giving a silica glass soot layer as a trench portion to an outer circumference of the first core rod, heating the soot layer at a temperature for transparently vitrifying the soot layer in the helium atmosphere and forming a second core rod having the trench portion to entire of which the negative dopant is added, and giving silica glass as a cladding portion to an outer circumference of the second core rod.
IN3398DE2014 2013-11-28 2014-11-21 IN2014DE03398A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013245500 2013-11-28
JP2014206521A JP6310378B2 (en) 2013-11-28 2014-10-07 Method for producing silica glass preform for optical fiber

Publications (1)

Publication Number Publication Date
IN2014DE03398A true IN2014DE03398A (en) 2015-08-21

Family

ID=51900237

Family Applications (1)

Application Number Title Priority Date Filing Date
IN3398DE2014 IN2014DE03398A (en) 2013-11-28 2014-11-21

Country Status (5)

Country Link
US (1) US20160214884A1 (en)
EP (1) EP2878583B1 (en)
JP (1) JP6310378B2 (en)
CN (1) CN104671658B (en)
IN (1) IN2014DE03398A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6124778B2 (en) * 2012-12-28 2017-05-10 信越化学工業株式会社 Optical fiber, silica glass preform for optical fiber, and method of manufacturing optical fiber
EP3359498B1 (en) * 2015-10-09 2020-12-23 Prysmian S.p.A. Method for manufacturing a glass core preform for optical fibres
US11780762B2 (en) * 2016-03-03 2023-10-10 Prysmian S.P.A. Method for manufacturing a preform for optical fibers
US9989699B2 (en) * 2016-10-27 2018-06-05 Corning Incorporated Low bend loss single mode optical fiber
US11634351B2 (en) * 2019-08-13 2023-04-25 Sterlite Technologies Limited Method for sintering of optical fibre preform
JP7332559B2 (en) * 2020-09-16 2023-08-23 信越化学工業株式会社 Manufacturing method of glass base material for optical fiber
CN114195379A (en) * 2021-12-21 2022-03-18 通鼎互联信息股份有限公司 Drawing method of low-loss cut-off wavelength displacement single-mode optical fiber
CN115010360B (en) * 2022-07-14 2024-04-09 中天科技精密材料有限公司 Preparation method of optical fiber preform, optical fiber preform and optical fiber

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US5217516A (en) * 1985-12-27 1993-06-08 Sumitomo Electric Industries, Ltd. Method of making optical glass article
EP0851247A3 (en) * 1996-12-27 2000-06-14 Sumitomo Electric Industries, Ltd Dispersion-shifted optical fibre and method of manufacturing the same
US6535679B2 (en) * 1997-01-16 2003-03-18 Sumitomo Electric Industries, Ltd. Optical fiber and method of manufacturing the same
EP1341011A1 (en) * 2002-02-28 2003-09-03 FITEL USA CORPORATION (a Delaware Corporation) Dispersion-compensating fiber
US7221838B2 (en) * 2004-06-23 2007-05-22 Furukawa Electric North America, Inc. Optical fibers with reduced splice loss and methods for making same
WO2009096557A1 (en) * 2008-01-30 2009-08-06 Asahi Glass Co., Ltd. Optical fiber preform used for energy transmission or ultraviolet light transmission and method of manufacturing the optical fiber preform
US7676129B1 (en) * 2008-11-18 2010-03-09 Corning Incorporated Bend-insensitive fiber with two-segment core
EP2330447A1 (en) * 2009-11-18 2011-06-08 Sehf-Korea Co., Ltd. Low bend loss optical fibre
JP5695025B2 (en) * 2010-03-03 2015-04-01 株式会社フジクラ Optical fiber preform manufacturing method
JP2012078804A (en) * 2010-09-06 2012-04-19 Shin Etsu Chem Co Ltd Optical fiber, optical fiber preform, and manufacturing method thereof
JP5590617B2 (en) * 2011-06-03 2014-09-17 信越化学工業株式会社 Manufacturing method of optical fiber preform having low refractive index portion at a position separated from core
US9873629B2 (en) * 2011-06-30 2018-01-23 Corning Incorporated Methods for producing optical fiber preforms with low index trenches
US8768129B2 (en) * 2011-09-21 2014-07-01 Ofs Fitel, Llc Optimized ultra large area optical fibers
KR101273801B1 (en) * 2011-10-17 2013-06-11 에쓰이에이치에프코리아 (주) Extreme bend insensitive fiber
KR20130116009A (en) * 2012-04-12 2013-10-22 신에쓰 가가꾸 고교 가부시끼가이샤 Optical fiber
DE102012007520B3 (en) * 2012-04-17 2013-08-08 Heraeus Quarzglas Gmbh & Co. Kg Process for the production of a cylindrical component from fluorine-containing synthetic quartz glass
JP2013230961A (en) * 2012-05-02 2013-11-14 Shin-Etsu Chemical Co Ltd Optical fiber preform manufacturing method
JP6124778B2 (en) * 2012-12-28 2017-05-10 信越化学工業株式会社 Optical fiber, silica glass preform for optical fiber, and method of manufacturing optical fiber
US9110220B2 (en) * 2013-07-16 2015-08-18 Corning Incorporated High bandwidth MMF and method of making

Also Published As

Publication number Publication date
JP6310378B2 (en) 2018-04-11
CN104671658A (en) 2015-06-03
EP2878583A1 (en) 2015-06-03
US20160214884A1 (en) 2016-07-28
CN104671658B (en) 2019-09-06
EP2878583B1 (en) 2017-01-11
JP2015127290A (en) 2015-07-09

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