MANUFACTURE OF QUARTZ BASE MATERIAL FOR OPTICAL FIBER

摘要

PURPOSE:To increase the fluorine content of a base material by converting a porous base material into transparent glass in an atmosphere of a gas contg. fluorine so as to dope the glass for a core and a clad with fluorine at the same time. CONSTITUTION:When fine glass particles produced by bringing starting materials into a chemical reaction such as oxidation or flame hydrolysis are deposited in a prescribed shape to form a base material, an oxide dopant is incorporated into at least one of the porous glass layers for a core and a clad. The porous base material is converted into transparent glass in an atmosphere of a gas contg. fluorine. A quartz base material for an optical fiber contg. fluorine as a dopant in the glass layers for a core and a clad is obtd.