JPS573733A - Preparation of optical fiber having single polarized light wave and single mode - Google Patents

Preparation of optical fiber having single polarized light wave and single mode

Info

Publication number
JPS573733A
JPS573733A JP7550180A JP7550180A JPS573733A JP S573733 A JPS573733 A JP S573733A JP 7550180 A JP7550180 A JP 7550180A JP 7550180 A JP7550180 A JP 7550180A JP S573733 A JPS573733 A JP S573733A
Authority
JP
Japan
Prior art keywords
optical fiber
areas
transient
laser beams
parent material
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
JP7550180A
Other languages
Japanese (ja)
Other versions
JPS6251217B2 (en
Inventor
Yutaka Sasaki
Tetsuo Miya
Yasuji Omori
Takao Edahiro
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP7550180A priority Critical patent/JPS573733A/en
Publication of JPS573733A publication Critical patent/JPS573733A/en
Publication of JPS6251217B2 publication Critical patent/JPS6251217B2/ja
Granted 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
    • C03B37/02—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
    • C03B2205/63—Ohmic resistance heaters, e.g. carbon or graphite resistance heaters
    • 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
    • C03B2205/69—Auxiliary thermal treatment immediately prior to drawing, e.g. pre-heaters, laser-assisted resistance heaters

Abstract

PURPOSE:To obtain an optical fiber having single polarized light wave and single mode, by attenuating a parent material of glass while irradiating partially two positions which are symmetry with respect to an axis in a part of the parent material of glass in a transient state with laser beams. CONSTITUTION:The laser beams 41 and 42 emitted from the laser producing devices 31 and 32 are condensed by the condensing lenses 33 and 34 into parts (transient optical fiber) wherein a parent material of glass for optical fiber is drawn from a melt state and it is in a transient state to become solidified fiber, for example, into two areas in the middle part of the melt part of conical parent material. The positions of two areas are points of symmetry with respect to the axis (the attenuating direction of the optical fiber 5) of the transient optical fiber in a cross section rectangular to the axis of the transient optical fiber. For example, if the temperature of the above-mentioned two areas is about 1,300 deg.C when the areas are not irradiated with the laser beams, about 50 deg.C is raised by condensing the laser beams, the attenuating speed is about 25m/min, and the average core diameter of the optical fiber with single mode is about 10mum, the elliptic ratio of the core is changed into about 80%.
JP7550180A 1980-06-06 1980-06-06 Preparation of optical fiber having single polarized light wave and single mode Granted JPS573733A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7550180A JPS573733A (en) 1980-06-06 1980-06-06 Preparation of optical fiber having single polarized light wave and single mode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7550180A JPS573733A (en) 1980-06-06 1980-06-06 Preparation of optical fiber having single polarized light wave and single mode

Publications (2)

Publication Number Publication Date
JPS573733A true JPS573733A (en) 1982-01-09
JPS6251217B2 JPS6251217B2 (en) 1987-10-29

Family

ID=13578061

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7550180A Granted JPS573733A (en) 1980-06-06 1980-06-06 Preparation of optical fiber having single polarized light wave and single mode

Country Status (1)

Country Link
JP (1) JPS573733A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100417000B1 (en) * 2001-12-03 2004-02-05 삼성전자주식회사 Apparatus for low polarization mode dispersion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100417000B1 (en) * 2001-12-03 2004-02-05 삼성전자주식회사 Apparatus for low polarization mode dispersion

Also Published As

Publication number Publication date
JPS6251217B2 (en) 1987-10-29

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