Acousto-optic deflector based on a paratellurite crystal using broadband acoustic adhesive contact

Abstract

A broadband acoustic matching of a piezoelectric transducer made of a lithium niobate crystal with an acousto-optic TeO₂ crystal has been studied. The transducer is acoustically attached to the crystal by the method of adhesive contact. The experimental method of creating a piezoelectric transducer with an acoustic matching layer from a tin film is developed. The conditions of the optimal technological regime when applying the matching layer are determined. The results of the research are used in creating a broadband high-performance deflector with a central ultrasound frequency of 37 MHz, with the frequency band scanning more than 30 MHz, and a diffraction efficiency of about 90% at a wavelength of 1.06 μm.