Faraday rotation glasses
United States Patent 3,935,020
Deeg , et al. January 27, 1976
Glasses Patent Abstract
Faraday rotation glasses exhibiting a high Verdet constant and a low susceptability toward devitrification are formed by introducing a high quantity of rare earth oxides into a borate glass base. The glasses can be melted under standard environmental conditions and may be made on a large scale.