A high-birefringence optical material is needed suitable for implementation in optical systems. The material also should feature high hardness making it amenable to standard polishing and manufacturing processes, low CTE (coefficient of thermal expansion), low CTRI (coefficient of thermal refractive index), low absorption at 1.55 micrometers, and reasonable bulk density.

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A new material is needed that can rotate linearly polarized light. Of further interest is any new material with unique optical characteristics. Such materials may come from new developments in biotechnology, films, coatings, polymer chemistry, mineralogy, metallurgy, or any other field.

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