METHOD OF SUPPORTING OPTICAL FIBER PREFORM

摘要

PROBLEM TO BE SOLVED: To prevent the disorder of the flow of a gas caused by the rapid fluctuation of furnace pressure at a place where a supporting tube for a clad begins to enter into the furnace in drawing. SOLUTION: In the manufacture of the optical fiber by heating and fusing the tip part of an optical fiber preform constituted of a core rod and a synthetic quartz pipe into which the core rod is inserted and drawing the core rod and the synthetic quartz tube while integrating, the method of supporting the optical fiber preform is performed by inserting the core rod into the synthetic quartz tube provided with a supporting tube having an inside diameter larger than the inside diameter of the synthetic quartz tube in one end. The outside diameter of the supporting tube is equal to or smaller than the outside diameter of the synthetic quartz tube. COPYRIGHT: (C)2004,JPO