Use of aluminum oxide and phosphorus pentoxide compounds for solubilizing rare earth metal ions present as doping agents in silica-based glass and to reduce the photodarkening of silica based glass

摘要

Use of aluminum oxide and phosphorus pentoxide compounds (I) for solubilizing rare earth metal ions as doping agents in silica-based glass, is claimed, where the ratio of molar concentration of phosphorus (Cp) and aluminum (CAl) is 1.3. Independent claims are included for: (1) silica-based glass comprising: rare earth metal ions, and aluminum oxide and phosphorus pentoxide; (2) optical fiber comprising a silica-based glass; and (3) nuclear glass comprising a silica-based glass.