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Acousto-Optic Deflector with Heat Removal from the Piezotransducer by Sound Insulation of a Heat Radiator

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Abstract

A method is proposed for removing heat from the transducer of an acousto-optic deflector without substantial acoustic damping. The rear surface of the transducer and the heat–radiator surface are kept in contact through a thin sound-insulating fluid layer. The method is based on the considerable difference in the complex acoustic impedances for shear vibrations of fluids and a solid (the piezotransducer) by means of efficient heat transfer through the fluid. In the experiment, a continuous operation mode of the acousto-optic deflector is achieved with an acoustic wave intensity of more than 20 W/cm2. The acousto-optic deflector has been created that operates in the Bragg diffraction mode with a phase–modulation index of 3π with an input continuous controlling electric power of 3 W. The deflector characteristics for a light wavelength of 1.06 μm are as follows: diffraction efficiency no less than 90% in the 25 MHz frequency band at an absolute scanning angle of 40 mrad.

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Funding

This work was supported by government funding, the state contract no. 0030-2019-0014.

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Authors and Affiliations

  1. Fryazino Branch, Kotel’nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, 141190, Fryazino, Moscow oblast, Russia

    S. N. Antonov

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  1. S. N. Antonov
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Correspondence to S. N. Antonov.

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Translated by N. Podymova

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Antonov, S.N. Acousto-Optic Deflector with Heat Removal from the Piezotransducer by Sound Insulation of a Heat Radiator. Acoust. Phys. 65, 487–494 (2019). https://doi.org/10.1134/S1063771019050038

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