Patent ID: 7823418
Filing Date: 2010-11-02
Classification: C03B

Abstract:
1. A method for manufacturing a glass base material used as a base material of an optical fiber, comprising: depositing glass soot on a starting base material of said glass base material by ejecting glass soot from a plurality of burners to said starting base material while moving said plurality of burners reciprocatory over a section of the entire length of said starting base material along the longitudinal direction of said starting base material; controlling flow rate of raw material gas of said glass soot supplied to said plurality of burners, individually for each of said plurality of burners; and vitrifying a deposit of said glass soot deposited by said depositing to generate said glass base material, wherein said controlling controls said flow rate of said raw material gas individually for each of said plurality of burners based on a deposition ratio of said glass base material generated by said vitrifying.