Patent ID: 9695079
Date: 2017-07-04
CPC Classifications: C03B,G02B

Claim:
1. A production method of an optical fiber preform, the method comprising: first preparing a first preform having a plurality of glass preforms and a first cladding portion disposed between the plurality of glass preforms; and first arranging a second cladding portion to surround the first preform, wherein at the first arranging, a material gas and a combustion gas are ejected from a burner to produce glass particles, the first preform and the burner are moved relative to each other in a longitudinal direction of the first preform, the glass particles are deposited on the first preform, and the first preparing includes second arranging a center glass preform as one of the plurality of glass preforms, fourth arranging the first cladding portion in which a material gas and a combustion gas are ejected from a burner to produce glass particles, the center glass preforms and the burner are moved relative to each other in a longitudinal direction of the center glass preforms, and the glass particles are deposited on the center glass preform, and third arranging an outer periphery glass preform as another one of the plurality of glass preforms on an outer periphery of the center glass preform on which the first cladding portion is disposed.