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

1985-09-30

1987-09-15

Schor, Kenneth M.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 312, 65 182, 65DIG16, C03B 37014

Patent

active

046937382

ABSTRACT:
An optical fiber comprising a core essentially made of quartz and a cladding made of fluorine added quartz is fabricated with good productivity from a glass preform produced by a method comprising maintaining a hollow cylindrical porous glass preform in a first high temperature atmosphere comprising at least one fluorine-containing compound with jetting a cooling gas through the central hollow part of the porous glass preform to grade the amount of fluorine to be added in the radial direction of the porous glass preform and then sintering the porous glass preform in a second high temperature atmosphere kept at a temperature higher than the first high temperature atmosphere to make it transparent.

REFERENCES:
patent: 4157906 (1979-06-01), Bailey
patent: 4165223 (1979-08-01), Powers
patent: 4263031 (1981-04-01), Schultz

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