Patent ID: 8997527
Filing Date: 2015-04-07
Classification: C03B,C03C

Abstract:
1. A method for manufacturing an optical fiber preform, the method comprising using a combustion burner including a glass source material gas discharge nozzle and two combustion gas ports that are adjacent to each other and are arranged in the vicinity of the glass source material gas discharge nozzle, the two combustion gas ports including: a combustion gas port A which includes a plurality of supporting gas discharge nozzles with a small diameter arranged so as to be close to the glass source material gas discharge nozzle; and a combustion gas port B which does not include the supporting gas discharge nozzle, burning a mixed gas including a glass source material gas from the glass source material gas discharge nozzle, a combustion gas from the combustion gas ports, and a supporting gas from the supporting gas discharge nozzle to deposit glass particles on a periphery of a target member, and at least one of: