Crystalo-optic and acousto-optic properties of monocrystalline (GaxIn1
-x)(2)Se-3, x = 0.3, 0.4 are described and analyzed. The acousto-optic
modulator was constructed with a monocrystal (Ga0.4In0.6)Se-3 as the
active element. The relevant acousto-optic parameters of such a modula
tor were determined and compared with characteristics of commercially
available systems. (C) 1997 Optical Society of America