The Underlying Technology of a Broadband Highly Efficient Acousto-Optic Cell (Deflector) on the Basis of a Paratellurite Crystal

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The technology for creating a broadband highly efficient piezoelectric transducer (PET) for generating a slow acoustic mode in an acousto-optic paratellurite crystal is based on the acoustic matching of a lithium-niobate transducer to paratellurite using the method of galvanic deposition of an intermediate tin layer. A thin heat-conducting liquid layer between the heat sink and PET is used to remove heat from the PET without acoustic damping. A broadband highly efficient deflector with a center frequency of ultrasound of 37 MHz, a frequency band of more than 30 MHz, and a diffraction efficiency of more than 90% at a wavelength of 1.06 μm was created. A stable continuous operating mode of the deflector at acoustic-wave intensities of more than 20 W/cm² has been achieved.