APPARATUS FOR PRODUCTION OF OPTICAL FIBER PREFORM BY CHEMICAL VAPOR DEPOSITION AND PROCESS THEREFOR

Japanese Patent JP3032764

B2

PROBLEM TO BE SOLVED: To provide an apparatus for production capable of shortening and lowering the time and process temp. in a condensation stage and improving the optical characteristics of a produced optical fiber preform in production of the optical fiber preform and the process therefor.
SOLUTION: The heating means of the apparatus for producing the optical fiber preform including the heating means 22, 33 for heating a substrate tube 5 rotating while moving in a prescribed progression direction and while swiveling the tube in the stage for producing the optical fiber preform by a corrected chemical vapor deposition method have the first heating means 32 which exists forward in the progression direction and heats the substrate tube with a dispersion type frame having a relatively low frame pressure and the second heating means 32 which exists backward of the progression direction as compared with the first heating means and heats the substrate tube with a concentration type frame having a relatively high frame pressure.

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Wu Sung Guo
Slow evening
Miyako
Yang Jin

JP17786599A

April 17, 2000

June 24, 1999

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Samsung Electronics Co.,Ltd.

C03B37/018; C23C16/46; G02B6/00; (IPC1-7): C03B37/018

Hidekazu Miyoshi (1 outside)

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