JPS5738336A - Manufacture of preform for optical fiber transmitting infrared ray - Google Patents

Manufacture of preform for optical fiber transmitting infrared ray

Info

Publication number
JPS5738336A
JPS5738336A JP11175780A JP11175780A JPS5738336A JP S5738336 A JPS5738336 A JP S5738336A JP 11175780 A JP11175780 A JP 11175780A JP 11175780 A JP11175780 A JP 11175780A JP S5738336 A JPS5738336 A JP S5738336A
Authority
JP
Japan
Prior art keywords
rod
preform
optical fiber
fluoride glass
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
JP11175780A
Other languages
Japanese (ja)
Inventor
Nariyuki Mitachi
Toyotaka Manabe
Shuichi Shibata
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 JP11175780A priority Critical patent/JPS5738336A/en
Publication of JPS5738336A publication Critical patent/JPS5738336A/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
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/01265—Manufacture of preforms for drawing fibres or filaments starting entirely or partially from molten glass, e.g. by dipping a preform in a melt
    • C03B37/01268—Manufacture of preforms for drawing fibres or filaments starting entirely or partially from molten glass, e.g. by dipping a preform in a melt by casting
    • 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
    • C03B2201/82—Fluoride glasses, e.g. ZBLAN glass

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)
  • Glass Compositions (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

PURPOSE:To obtain a preform for an optical fiber transmitting infrared rays by fixing a fluoride glass rod at the center of the cylindrical hollow part of a mold splittable into a plurality of segments, pouring molten fluoride glass in the gap between the outer frame of the mold and the rod, and slowly cooling the glass after annealing. CONSTITUTION:A fluoride glass rod 7 is fixed at the center of the cylindrical hollow part 6 of the mold formed with an outer frame 1 vertically splittable into a plurality of segments and forming the part 6, and after preheating the rod 7 at a temp. below the transition temp. of fluoride glass, molten fluoride glass having a lower refractive index than the rod 7 is poured in the gap between the frame 1 and the rod 7. The mold is then maintained at a temp. below the transition temp. of the fluoride glass to anneal the glass, and it is slowly cooled. After the cooling the frame 1 is detached to obtain a preform for an optical fiber transmitting infrared rays.
JP11175780A 1980-08-15 1980-08-15 Manufacture of preform for optical fiber transmitting infrared ray Pending JPS5738336A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11175780A JPS5738336A (en) 1980-08-15 1980-08-15 Manufacture of preform for optical fiber transmitting infrared ray

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11175780A JPS5738336A (en) 1980-08-15 1980-08-15 Manufacture of preform for optical fiber transmitting infrared ray

Publications (1)

Publication Number Publication Date
JPS5738336A true JPS5738336A (en) 1982-03-03

Family

ID=14569412

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11175780A Pending JPS5738336A (en) 1980-08-15 1980-08-15 Manufacture of preform for optical fiber transmitting infrared ray

Country Status (1)

Country Link
JP (1) JPS5738336A (en)

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