Method for producing glass preform for optical fiber

Glass manufacturing – Press molding machine – Plunger coacting with successively presented molds

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65 182, 65 29, C03B 37018

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047311037

ABSTRACT:
A glass preform for an optical fiber having homogeneous distribution of bulk density in its radial direction is produced by a method comprising forming fine glass particles by jetting a gaseous glass material and a fuel gas from a burner, depositing the fine glass particles on a seed rod to form a soot rod with measuring a temperature of a part of the soot rod on which the glass particles are being deposited so as to control said temperature, and then sintering the soot rod to obtain a transparent glass preform.

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Izawa; The Transactions of the IECE of Japan, vol. E62, No. 11; Nov., 1979; pp. 779-785; "Continuous Fabrication Process for High-Silica Fiber Preforms".

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