Thallium arsenic sulfide, T2,3AsS4, is one of a class of sulfosalt crystals which have been recognized as being potentially important for acousto-optic applications. This bi-axial crystal has a very high figure of merit, M2 = 525, and an anomalously slow shear acoustic velocity, leading to both isotropic as well as anisotropic Bragg cells with high performance capabilities. We have built and tested a number of TASL cells, characterized their performance, and determined their limitations.
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