ACOUSTOOPTIC BRAGG ELEMENT Russian patent published in 2019 - IPC G02F1/33 

FIELD: optics; acoustics.

SUBSTANCE: invention relates to acoustooptics and can be used in devices deflection and modulation of laser beams and, in particular, in the development of information input devices in systems for optical processing of radio signals. Device consists of a photoelastic medium and a multi-element piezoelectric transducer acoustically connected to it, containing a sequence of electrically connected in a row arranged by means of long ribbon conductors with one of the electrodes of the transmission line of capacitive elements filled in the form of a piezoelectric layer of the same thickness, in which the electrodes are located on the opposite side of the piezoelectric layer, are also connected directly to the same electrode of the transmission line, and the first ribbon conductor connecting the capacitive element at the row and the electrode of the transmission line is connected in its middle part to another electrode of the transmission line, and the electrode of each capacitive element between the piezoelectric layer and the photoelastic medium is made in the form of a wedge with a thickness varying in the direction of a number of capacitive elements. Each ribbon conductor connects a group of several, at least two adjacent capacitive elements with one of the electrodes of the transmission line, and the gap between adjacent ribbon conductors is equal to the arithmetic average of the gaps between the capacitive elements in the extreme pairs, located next to each other in adjacent groups of capacitive elements.

EFFECT: technical result consists in increasing the diffraction efficiency during the operation of the Bragg acousto-optic element in the upper part of the decimeter and centimeter range of electromagnetic wavelengths.

4 cl, 5 dwg