TREATMENT OF GLASS FOR OPTICAL FIBER

摘要

PURPOSE:To improve the radiation resistance of quartz glass for an optical fiber by exposing the glass to an atmosphere contg. hydrogen to bond hydrogen only to defects in the glass and to introduce a proper number of OH groups. CONSTITUTION:Glass for an optical fiber such as a molded body of quartz glass soot forming a porous glass base material for an optical fiber, a molded body of quartz glass forming a transparent glass base material for an optical fiber or a molded body of glass forming an optical fiber is exposed to an atmosphere contg. hydrogen to bond hydrogen only to defects in the glass and to introduce the irreducible minimum number of OH groups required. Thus, an optical fiber enduring a radiation environment is obtd.