JPS5654242A - Controlling method of refractive index of optical fiber matrix - Google Patents

Controlling method of refractive index of optical fiber matrix

Info

Publication number
JPS5654242A
JPS5654242A JP13078979A JP13078979A JPS5654242A JP S5654242 A JPS5654242 A JP S5654242A JP 13078979 A JP13078979 A JP 13078979A JP 13078979 A JP13078979 A JP 13078979A JP S5654242 A JPS5654242 A JP S5654242A
Authority
JP
Japan
Prior art keywords
signal
optical fiber
width
refractive index
signal voltage
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.)
Granted
Application number
JP13078979A
Other languages
Japanese (ja)
Other versions
JPS5851896B2 (en
Inventor
Katsuyuki Imoto
Masao Sumi
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.)
Hitachi Cable Ltd
Hitachi Ltd
Original Assignee
Hitachi Cable Ltd
Hitachi 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 Hitachi Cable Ltd, Hitachi Ltd filed Critical Hitachi Cable Ltd
Priority to JP13078979A priority Critical patent/JPS5851896B2/en
Publication of JPS5654242A publication Critical patent/JPS5654242A/en
Publication of JPS5851896B2 publication Critical patent/JPS5851896B2/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
    • C03B37/014—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]
    • C03B37/01413—Reactant delivery systems
    • C03B37/0142—Reactant deposition burners
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2207/00—Glass deposition burners
    • C03B2207/40—Mechanical flame shields
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2207/00—Glass deposition burners
    • C03B2207/70—Control measures

Abstract

PURPOSE:To prepare a high-quality optical fiber with a good reproducibility by a method wherein a laser beam scans variations in optical strength, which is detected by a photoelectric element to regulate a burner flame in its radial expansion so that the refractive index of an optical fiber matrix is controlled. CONSTITUTION:A sinewave reference signal is formed so that its phase matches the phase of light scanning. When the square wave rises and falls, the respective voltages of the reference signal are sampled and held. The difference in both the voltages is taken instead of the pluse width thereby to obtain a signal voltage in proportion to the width of flame expansion. This signal voltage is input to the control circuit 22 which stores the predefined standard signal voltage 23. The control circuit 22 compares and amplifies the two signals. If an error signal is generated at the output, the signal is fed back to the motor drive circuit 24, which drives the motor 17 to cause the protective tube 15 to move in the arrow direction 18 or 18'. The motor continues to drive until the error signal become 0 so that the width of burner flame is controlled to reach the predetermined value.
JP13078979A 1979-10-12 1979-10-12 Method for controlling refractive index of optical fiber base material Expired JPS5851896B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13078979A JPS5851896B2 (en) 1979-10-12 1979-10-12 Method for controlling refractive index of optical fiber base material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13078979A JPS5851896B2 (en) 1979-10-12 1979-10-12 Method for controlling refractive index of optical fiber base material

Publications (2)

Publication Number Publication Date
JPS5654242A true JPS5654242A (en) 1981-05-14
JPS5851896B2 JPS5851896B2 (en) 1983-11-18

Family

ID=15042717

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13078979A Expired JPS5851896B2 (en) 1979-10-12 1979-10-12 Method for controlling refractive index of optical fiber base material

Country Status (1)

Country Link
JP (1) JPS5851896B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0054263A1 (en) * 1980-12-12 1982-06-23 Nippon Telegraph and Telephone Public Corporation Process for producing optical fiber preform and apparatus therefor
US5709241A (en) * 1995-01-09 1998-01-20 Toyota Jidosha Kabushiki Kaisha Butterfly valve
US6830781B2 (en) * 2000-11-08 2004-12-14 Heraeus Quarzglas Gmbh & Co. Kg Method for producing an SiO2 blank and apparatus for performing said method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0054263A1 (en) * 1980-12-12 1982-06-23 Nippon Telegraph and Telephone Public Corporation Process for producing optical fiber preform and apparatus therefor
US5709241A (en) * 1995-01-09 1998-01-20 Toyota Jidosha Kabushiki Kaisha Butterfly valve
US6830781B2 (en) * 2000-11-08 2004-12-14 Heraeus Quarzglas Gmbh & Co. Kg Method for producing an SiO2 blank and apparatus for performing said method

Also Published As

Publication number Publication date
JPS5851896B2 (en) 1983-11-18

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