WO2018138736A3 - Optical fiber draw assembly and fabricated optical fiber thereof - Google Patents

Optical fiber draw assembly and fabricated optical fiber thereof Download PDF

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Publication number
WO2018138736A3
WO2018138736A3 PCT/IN2018/050037 IN2018050037W WO2018138736A3 WO 2018138736 A3 WO2018138736 A3 WO 2018138736A3 IN 2018050037 W IN2018050037 W IN 2018050037W WO 2018138736 A3 WO2018138736 A3 WO 2018138736A3
Authority
WO
WIPO (PCT)
Prior art keywords
optical fiber
core rod
assembly
fiber draw
draw assembly
Prior art date
Application number
PCT/IN2018/050037
Other languages
French (fr)
Other versions
WO2018138736A2 (en
Inventor
Anand KUMAR PANDEY
Munige Srinivas REDDY
Sankalp SELOT
Original Assignee
Sterlite Technologies Limited
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 Sterlite Technologies Limited filed Critical Sterlite Technologies Limited
Priority to CA3070060A priority Critical patent/CA3070060A1/en
Publication of WO2018138736A2 publication Critical patent/WO2018138736A2/en
Publication of WO2018138736A3 publication Critical patent/WO2018138736A3/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
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
    • C03B37/02754—Solid fibres drawn from hollow preforms
    • 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
    • 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
    • C03B37/01205—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
    • C03B37/0126—Means for supporting, rotating, translating the rod, tube or preform
    • 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
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
    • C03B37/02736—Means for supporting, rotating or feeding the tubes, rods, fibres or filaments to be drawn, e.g. fibre draw towers, preform alignment, butt-joining preforms or dummy parts during feeding
    • 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
    • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
    • C03C25/66—Chemical treatment, e.g. leaching, acid or alkali treatment
    • C03C25/68—Chemical treatment, e.g. leaching, acid or alkali treatment by etching
    • 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
    • G02B6/03605—Highest refractive index not on central axis
    • 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
    • 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
    • C03B2203/23—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
    • G02B6/0281—Graded index region forming part of the central core segment, e.g. alpha profile, triangular, trapezoidal core
    • 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

The present disclosure provides an optical fiber draw assembly (100). The optical fiber draw assembly (100) includes a central core rod (102). The central core rod (102) includes a core region (103) longitudinally extending in a vertical direction. The central core rod (102) further includes a first cladding region (105). The optical fiber draw assembly (100) further includes a fluorine-doped tube (104) longitudinally extending from a first end (114) to a second end (116) in the vertical direction. The optical fiber draw assembly (100) further includes a hollow clad cylinder (106). The core rod assembly (118) is sheathed inside the hollow clad cylinder (106). The central core rod (102) and the fluorine-doped tube (104) collectively form the core rod assembly (118). The geometrical center of the core rod assembly (118) and the geometrical center of the hollow clad cylinder (106) coincide.
PCT/IN2018/050037 2017-01-27 2018-01-24 Optical fiber draw assembly and fabricated optical fiber thereof WO2018138736A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA3070060A CA3070060A1 (en) 2017-01-27 2018-01-24 Optical fiber draw assembly and fabricated optical fiber thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN201721003135 2017-01-27
IN201721003135 2017-01-27

Publications (2)

Publication Number Publication Date
WO2018138736A2 WO2018138736A2 (en) 2018-08-02
WO2018138736A3 true WO2018138736A3 (en) 2018-09-20

Family

ID=62979097

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2018/050037 WO2018138736A2 (en) 2017-01-27 2018-01-24 Optical fiber draw assembly and fabricated optical fiber thereof

Country Status (2)

Country Link
CA (1) CA3070060A1 (en)
WO (1) WO2018138736A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7019617B2 (en) 2019-02-07 2022-02-15 古河電気工業株式会社 Optical fiber and manufacturing method of optical fiber
CN114075036B (en) * 2021-11-30 2023-04-18 杭州金星通光纤科技有限公司 Ultralow-loss optical fiber preform and manufacturing method thereof
CN114956543B (en) * 2022-08-03 2022-10-11 武汉理工大学 Prefabricated rod of elliptical core polarization maintaining optical fiber and preparation method of optical fiber

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6519403B1 (en) * 1998-12-22 2003-02-11 Sumitomo Electric Industries, Ltd. Optical fiber and method of making the same
EP1712934A1 (en) * 2005-03-23 2006-10-18 Furukawa Electric North America Inc. Optical fiber preform with overclad tubes
US20080087303A1 (en) * 2006-10-17 2008-04-17 Furukawa Electric North America, Inc. Method of preparing core rods for optical fiber preforms
US7836728B2 (en) * 2007-05-09 2010-11-23 Ofs Fitel, Llc Increasing the cladding-to-core ratio (D/d) of low D/d ratio core rods in optical fiber performs
US7848604B2 (en) * 2007-08-31 2010-12-07 Tensolite, Llc Fiber-optic cable and method of manufacture

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6519403B1 (en) * 1998-12-22 2003-02-11 Sumitomo Electric Industries, Ltd. Optical fiber and method of making the same
EP1712934A1 (en) * 2005-03-23 2006-10-18 Furukawa Electric North America Inc. Optical fiber preform with overclad tubes
US20080087303A1 (en) * 2006-10-17 2008-04-17 Furukawa Electric North America, Inc. Method of preparing core rods for optical fiber preforms
US7836728B2 (en) * 2007-05-09 2010-11-23 Ofs Fitel, Llc Increasing the cladding-to-core ratio (D/d) of low D/d ratio core rods in optical fiber performs
US7848604B2 (en) * 2007-08-31 2010-12-07 Tensolite, Llc Fiber-optic cable and method of manufacture

Also Published As

Publication number Publication date
WO2018138736A2 (en) 2018-08-02
CA3070060A1 (en) 2018-08-02

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