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We suggest acoustooptic deflector operating at two different light wavelengths. Geometry of paratellurite crystal is chosen such that it simultaneously satisfies the Bragg conditions at those wavelengths. This enables beam steering at either of the wavelengths in the same predefined angular range. The wavelengths are switched by means of changing the sound frequency, so that only one of the wavelengths is available at the output of the deflector at each specific moment of time. A technique for calculations of parameters of the device is described. The deflector has been successfully constructed and investigated experimentally.

Broadband acoustooptic diffraction of two-wavelength light in paratellurite