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

1992-02-05

1993-08-17

Lindsay, Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 311, C03B 37023

Patent

active

052364828

ABSTRACT:
A glass preform for use in the fabrication of an optical fiber having a reduced transmission loss is produced by synthesizing a soot preform by a vapor synthesis method and consolidating the soot preform in an electric furnace to obtain a glass preform, wherein an intermediate body consisting of a core portion and an inner part of a cladding portion is consolidated under atmospheric pressure and an outer part of the cladding portion which surrounds a periphery of the intermediated body is consolidated under reduced pressure or in vacuo.

REFERENCES:
patent: 4579571 (1986-04-01), Hicks
patent: 4596589 (1986-06-01), Perry
patent: 4620861 (1986-11-01), Berkey

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