Abstract
A short review of composition selection criteria for chalcogenide glasses to be used in acousto-optic devices is presented. Emphasis is given to combining a high acousto-optic interaction coefficient, M2, with good glass stability and transmission over the range 1.5–10.6 μm. A base composition in the system As-Se-Te is considered for use in devices operating at low acoustic frequency, to which heavy elements are systematically added to improve optical properties within the limits of glass stability. The tendency toward liquid/liquid phase separation in these systems is discussed with regard to their use in acousto-optic applications.
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