Oxide glasses with earth ions have a number of different applications including: lasers, optical switches, optical amplifiers and have anti-glare properties. These rare earth glasses, however, come with a number of problems including concentration quenching, low solubility, and inhomogenous distributions of the glass components. This invention tackles these issues by providing a process for preparing rare earth containing glasses. The glass is treated at a higher temeprature than the spinodal temperature, causing it to be homogeneous, clear, and reduced concentration quenching.

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Natasha Sanford