Containerless Research, Inc.

April D Hixson

Paul C Nordine

J K Richard Weber

Johan G Abadie

A bulk single phase glass comprising 23 molar % to 50 molar % rare earth oxides, RE  , and 50 molar % to 77 molar % aluminum oxide, A1 O is provided. The glass contains at least 50 molar % of Al O &plus;RE O and smaller amounts of oxide glass forming agents and other oxides than are found in prior art glasses. The addition of small amounts of lanthanum oxide, La O , prevents phase separation. The single phase glass is useful for optical applications such as lasers and optical amplifiers.

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Cedar Rapids, IA, United States of America

April D Hixson