CORE GLASS FOR A PREFORM FOR AN OPTICAL FIBER, PREFORM MADE FROM THE CORE GLASS, AND METHOD FOR MAKING THE CORE GLASS AND AN OPTICAL FIBER

摘要

Core glass is obtained by flame hydrolysis of a silicon compound, depositing finely ground silicon dioxide on a substrate with direct vitrification, and forming a synthetic quartz glass. The quartz glass has a hydrogen content of less than 1 x 1018 molecules/cm3.