METHOD FOR PRODUCING GLASS BASE MATERIAL FOR OPTICAL FIBER

摘要

A method of manufacturing a glass base material is provided. The glass base material according to the present invention can prevent an initial glass material from being scratched by a gripping portion and from being unfastened and can manufacture in a stable state without deflecting the initial glass material during depositing glass particles when the initial glass material is gripped by metal chucks, and the glass particle are deposited on the periphery of the initial glass material. A cushioning material of which surface has irregularity is intervened between the initial glass material and the gripping portion of a gripping device when the initial glass material is rotated with gripped by the gripping device and the glass particles are deposited on the periphery of the staring glass material. The cushioning material is preferably an elastic material having the thickness twice as long as the depth of the irregularity on the surface of the initial glass material.