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An Acousto-Optical Deflector Based on Paratellurite: Increasing the Thermal Stability of Parameters
Instruments and Experimental Techniques  (IF0.573),  Pub Date : 2021-09-14, DOI: 10.1134/s0020441221040011
Antonov, S. N., Rezvov, Yu. G.

Abstract

The phenomena that occur during internal heating (release of the control radio power) of an acousto-optic deflector based on paratellurite with heat removal from the piezoelectric transducer through a liquid contact were experimentally investigated. It was found that, in addition to the temperature drift of the velocity of sound and the refractive indices, the temperature inhomogeneity has a significant effect on the deflector characteristics. In this case, the volume of the crystal behaves like an optical wedge, which is optically denser near the transducer and less dense at a distance from it. The effect of internal compensation of the thermal deviation of the diffracted-beam position at a certain deflector orientation is detected.