We present a family of original acousto-optical devices. They are based on new acousto-optical materials KRE(WO4)2, where RE = Y, Gd, Yb, Lu. A combination of features such as radiation resistance, optical biaxiality and appreciable acousto-optical gure of merit, makes possible creation of polarization-insensitive modulator with almost 100% of diraction eciency. The deector with wide angular aperture and broad range of deection, and collinear tunable lter are also suggested.
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