Gap Effect Width Between Electrode Sections on the Acousto-Optic Deflector Characteristics Based on Optically Isotropic Medium

The quasi-orthogonal geometry of the acousto-optic interaction in an optically isotropic medium is considered. A comparison is made between an acousto-optic deflector using a piezoelectric transducer completely covered with an electrode and a deflector with a sectioned transducer. It is shown that the presence of a gap between electrode sections should affect the characteristics of the acousto-optic deflector. The transfer functions of the deflector with eight sections are calculated. It has been established that at an optimal angle of incidence of radiation, an increase in the gap between the electrode sections leads to a narrowing of the frequency response of the deflector, while at an angle of incidence of radiation corresponding to a dip of 50% in the center of the frequency response, the working frequency bandwidth of the deflector, on the contrary, expands with an increase in the gap between electrode sections.