Method for producing glass preform for optical fiber

Details Method for producing glass preform for optical fiber Method for producing glass preform for optical fiber

1989-06-28

1990-12-18

Lacey, David L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 182, 65900, 65 321, C03B 37012

Patent

active

049783785

ABSTRACT:
A glass preform for use in the fabrication of an optical fiber having little bubbles is produced by a method comprising depositing glass soot on a periphery of a starting glass rod to form a porous glass preform, heating and sintering the porous glass preform in a helium atmosphere to consolidate the porous glass preform and then heating the sintered glass in an atmosphere containing an inert gas except helium having partial pressure of the inert gas of not lower than 0.8 atm. to obtain a transparent glass preform.

REFERENCES:
patent: 3806570 (1974-04-01), Flamenbaum et al.
patent: 4149867 (1979-04-01), Akamatsu et al.
patent: 4157906 (1979-06-01), Bailey
patent: 4251251 (1981-02-01), Blankenship
patent: 4586943 (1986-05-01), Kyoto et al.
Ikemura et al., "Manufacture of Quartz Glass Performs", Chemical Abstracts, vol. 107, No. 4, Abstract 27346q.
Akira Iino, "Production of Base Material for Optical Fiber", Patent Abstracts of Japan, vol. 11, No. 267, (C-443[2714], Aug. 28, 1987.

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