JPS56164027A - Production of optical fiber - Google Patents

Production of optical fiber

Info

Publication number
JPS56164027A
JPS56164027A JP6777680A JP6777680A JPS56164027A JP S56164027 A JPS56164027 A JP S56164027A JP 6777680 A JP6777680 A JP 6777680A JP 6777680 A JP6777680 A JP 6777680A JP S56164027 A JPS56164027 A JP S56164027A
Authority
JP
Japan
Prior art keywords
nacl
crystals
outer layer
glass tube
hollow glass
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.)
Pending
Application number
JP6777680A
Other languages
Japanese (ja)
Inventor
Hidefumi Mori
Satoru Oku
Masahiro Ikeda
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 JP6777680A priority Critical patent/JPS56164027A/en
Publication of JPS56164027A publication Critical patent/JPS56164027A/en
Pending 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
    • C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/80—Non-oxide glasses or glass-type compositions
    • C03B2201/84—Halide glasses other than fluoride glasses, i.e. Cl, Br or I glasses, e.g. AgCl-AgBr "glass"

Abstract

PURPOSE:At least one of crystaline halides are placed in a hollow galss tube that has an outer layer of glass softening at a higher temperature than the crystal and the hollow glass tube is heat drawn to produce optical fibers transmitting rays of wave length from visible to infrared range. CONSTITUTION:Crystals of halide such as NaCl, NaBr, eutectic mixture of NaCl- AgCl or NaCl-AgBr 1 are placed in the hollow glass tube 4 that consists of the inner layer 2 and the outer layer 3. The softening point of the outer layer 3 must be higher than that of the crystals. Then, the resultant hollow glass tube 4 is drawn under heating in the furnace 7 to form the objective optical fiber 8. The drawing is sometimes followed by annealing to form refractive index distribution in the crystals by uneven precipitation of the solute during the crystallization.
JP6777680A 1980-05-23 1980-05-23 Production of optical fiber Pending JPS56164027A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6777680A JPS56164027A (en) 1980-05-23 1980-05-23 Production of optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6777680A JPS56164027A (en) 1980-05-23 1980-05-23 Production of optical fiber

Publications (1)

Publication Number Publication Date
JPS56164027A true JPS56164027A (en) 1981-12-16

Family

ID=13354685

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6777680A Pending JPS56164027A (en) 1980-05-23 1980-05-23 Production of optical fiber

Country Status (1)

Country Link
JP (1) JPS56164027A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS582232A (en) * 1981-06-23 1983-01-07 Sumitomo Electric Ind Ltd Manufacture of optical fiber
JPS61286239A (en) * 1985-06-10 1986-12-16 Tatsuta Electric Wire & Cable Co Ltd Preparation of parent material for optical fiber

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS582232A (en) * 1981-06-23 1983-01-07 Sumitomo Electric Ind Ltd Manufacture of optical fiber
JPS61286239A (en) * 1985-06-10 1986-12-16 Tatsuta Electric Wire & Cable Co Ltd Preparation of parent material for optical fiber
JPH0253377B2 (en) * 1985-06-10 1990-11-16 Tatsuta Densen Kk

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