METHOD AND DEVICE FOR MANUFACTURING OPTICAL FIBER BY ADJUSTING OXYGEN STOICHIOMETRIC RATIO

摘要

PURPOSE: A fiber manufacturing method is provided to reduce the likelihood of generating defects in optical fiber preforms that, in optical fiber drawn therefrom, attract and bond with hydrogen atoms to form molecules that increase transmission loss in the fiber. CONSTITUTION: The oxygen stoichiometry is adjusted for the environment in which at least one step of the core rod formation occurs. The environment for the overclad region is formed. The environment for fiber drawing is formed. Manufacturing the core rod and the oxygen stoichiometry is adjusted for the environment for the soot depositing. The environment for dehydration is formed. The environment for the consolidation is formed. Typically, the oxygen stoichiometry is adjusted for the environment for the dehydration.