WO2008062465A3 - Apparatus & method for drawing optical fiber having desired waveguide parameters and fiber produced thereby - Google Patents

Apparatus & method for drawing optical fiber having desired waveguide parameters and fiber produced thereby Download PDF

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Publication number
WO2008062465A3
WO2008062465A3 PCT/IN2007/000481 IN2007000481W WO2008062465A3 WO 2008062465 A3 WO2008062465 A3 WO 2008062465A3 IN 2007000481 W IN2007000481 W IN 2007000481W WO 2008062465 A3 WO2008062465 A3 WO 2008062465A3
Authority
WO
WIPO (PCT)
Prior art keywords
preform
furnace
power supply
maintaining
fiber
Prior art date
Application number
PCT/IN2007/000481
Other languages
French (fr)
Other versions
WO2008062465A2 (en
Inventor
Hrudayan Ranjan Sahu
Rakesh Kumar
Balaji Biradar
Deepak Thakur
Original Assignee
Sterlite Optical Technologies Ltd.
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 Optical Technologies Ltd. filed Critical Sterlite Optical Technologies Ltd.
Publication of WO2008062465A2 publication Critical patent/WO2008062465A2/en
Publication of WO2008062465A3 publication Critical patent/WO2008062465A3/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
    • C03B37/029—Furnaces therefor
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/60—Optical fibre draw furnaces
    • C03B2205/62—Heating means for drawing
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/60—Optical fibre draw furnaces
    • C03B2205/72—Controlling or measuring the draw furnace temperature

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

An apparatus and method for drawing a fiber having desired waveguide parameters, particularly cut-off wavelength is provided. The apparatus is characterized by a temperature measurement means (113) provided near surface (A) of the preform (105), being capable of directly measuring surface temperature of that part of the preform (105) which is outside the furnace; and a programmable logic controller [PLC] (114) connectable to said temperature measurement means (113), and being capable of controlling and maintaining temperature of that part of the preform (105) which is inside the furnace (101) by continuously controlling and maintaining the power supply to heating (elements 104) of the furnace, wherein the PLC (114) is capable of controlling and maintaining power supply to the heating elements (104) by employing equation (1) till the preform completely just enters the furnace Power supply = (start power) x C + (surface temperature of preform which is outside furnace) x (slope term)...... Eqn. (1) and by employing equation (2) after the preform has completely entered in the furnace Power supply = slope x (( π (d/2) 2 xL r )/ 1000) + C1......Eqn. (2).
PCT/IN2007/000481 2006-10-17 2007-10-15 Apparatus & method for drawing optical fiber having desired waveguide parameters and fiber produced thereby WO2008062465A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN1720MU2006 2006-10-17
IN1720/MUM/2006 2007-10-15

Publications (2)

Publication Number Publication Date
WO2008062465A2 WO2008062465A2 (en) 2008-05-29
WO2008062465A3 true WO2008062465A3 (en) 2009-09-24

Family

ID=39430176

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2007/000481 WO2008062465A2 (en) 2006-10-17 2007-10-15 Apparatus & method for drawing optical fiber having desired waveguide parameters and fiber produced thereby

Country Status (1)

Country Link
WO (1) WO2008062465A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102010124B (en) * 2010-10-29 2012-08-08 中天科技光纤有限公司 Automatic gas flow control device for wire drawing furnace
CN104503509B (en) * 2014-12-04 2017-02-01 中天科技光纤有限公司 Control method of induction furnace water temperature constant automatic control system
WO2022244529A1 (en) * 2021-05-18 2022-11-24 株式会社フジクラ Optical fiber manufacturing method and optical fiber manufacturing apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19536960A1 (en) * 1995-10-04 1996-03-21 Heraeus Quarzglas Long glass component prodn. by drawing process
EP0885852A1 (en) * 1997-06-19 1998-12-23 Shin-Etsu Chemical Co., Ltd. Method for drawing a glass ingot
EP1079216A1 (en) * 1999-08-20 2001-02-28 Alcatel Infrared high temperature measurement of optical fiber during draw
JP2003212576A (en) * 2002-01-21 2003-07-30 Sumitomo Electric Ind Ltd Method for elongating glass preform
JP2003267745A (en) * 2002-03-15 2003-09-25 Fujikura Ltd Method and apparatus for drawing optical fiber

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19536960A1 (en) * 1995-10-04 1996-03-21 Heraeus Quarzglas Long glass component prodn. by drawing process
EP0885852A1 (en) * 1997-06-19 1998-12-23 Shin-Etsu Chemical Co., Ltd. Method for drawing a glass ingot
EP1079216A1 (en) * 1999-08-20 2001-02-28 Alcatel Infrared high temperature measurement of optical fiber during draw
JP2003212576A (en) * 2002-01-21 2003-07-30 Sumitomo Electric Ind Ltd Method for elongating glass preform
JP2003267745A (en) * 2002-03-15 2003-09-25 Fujikura Ltd Method and apparatus for drawing optical fiber

Also Published As

Publication number Publication date
WO2008062465A2 (en) 2008-05-29

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