Production method of optical fiber preform and production method of optical fiber

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United States of America Patent

PATENT NO 9902643
SERIAL NO

15192590

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Abstract

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A production method of an optical fiber preform includes: forming a porous preform by depositing silica particles at an outer periphery of a core rod; and vitrifying the porous preform by conducting thermal treatment steps. At a first thermal treatment step that is an initial thermal treatment step of the thermal treatment steps, the porous preform is heated so that internal temperatures at two end portions in a longitudinal direction of the porous preform increase before an internal temperature of a center portion in the longitudinal direction increases.

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Patent Owner(s)

  • FURUKAWA ELECTRIC CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Shinada, Seiichi Tokyo, JP 6 5

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