METHOD AND APPARATUS FOR MANUFACTURING OPTICAL FIBER PREFORM

摘要

PROBLEM TO BE SOLVED: To smoothly exhaust excess soot formed in a reaction tube to the exterior of the reaction tube in manufacturing an optical fiber preform by a chemical vapor deposition process.

SOLUTION: The method for manufacturing the optical fiber preform comprises steps of electrically charging created soot with a first predetermined charge; adhering the soot that is not deposited on the inside wall of the reaction tube 240 to an electrified body 261 charged with a second charge that is opposite to the first predetermined charge; moving the electrified body 261 having the soot adhered thereto to the exterior of the reaction tube 240; and exhausting the soot adhering to the electrified body 261 to the exterior of the reaction tube 240 by utilizing the electrification phenomenon by charging the electrified body 261 with a charge identical to the first predetermined charge of the soot.

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