Patent ID: 6895783

Claim:
A method of producing an optical fiber preform comprising: preparing a plurality of burners arranged with a predetermined burner interval opposite to a rotating starting rod; moving parallely and relatively reciprocally the starting rod and the burners, while a turning back position of the reciprocal movement is moved in a predetermined direction by each one integer-th of the burner interval for each movement, and when the turning back position is moved by the burner interval, the turning back position is moved to a reversal direction by the each one integer-th of the burner interval for each movement, so that glass particles synthesized by the burners are successively deposited on a surface of the starting rod; and consolidating and vitrifying the obtained glass particles deposit, wherein a relative reciprocating speed of the starting rod and burners v(mm/minute), an axis rotating speed of the starting rod r (rpm), and a burner interval L (mm) are set so that a value A expressed by the expression A=(r/v)×L is in a range 40≧A≧8.