P.I. Ropot1, A.V. Agashkov2, A.M. Varanetsky3, V.I. Kazakov4, O.V. Shakin5, S.V. Akimov6

1−3 Institute of Physics of the National Academy of Sciences of Belarus (Minsk, Belarus)

4,5 St. Petersburg State University of Aerospace Instrumentation (St. Petersburg, Russia)

5 Ioffe Institute (St. Petersburg, Russia)

6 LLC "VPG Lazerone" (Fryazino, Moscow Region, Russia)

4 vasilykazakov@mail.ru, 5 oshakin@mail.ru

The paper considers the problem of efficient acousto-optic scanning of laser beams for their use in optical communication and location systems. The aim of the study is to develop and experimentally investigate a two-coordinate acousto-optic (AO) deflector on a TeO₂ crystal, providing the formation and scanning of Bessel-type beams with high axial symmetry and a minimum number of side rings. A scheme is proposed in which the original Gaussian beam is transformed into a ring beam using a tandem of axicons, and then deflected by two orthogonally oriented AO cells. In this case, a few-ring Bessel-Gaussian beam with a pronounced central maximum is formed in the far zone. The experimental results showed that the developed deflector allows achieving high diffraction efficiency (up to 84%), a stable angular scanning range (±1.2°), and an increase in resolution compared to scanning Gaussian beams. It was found that in the far zone, the intensity in the central maximum is up to 85% of the full power, and the resolution of acousto-optic scanning increases more than twice. The practical significance of the work lies in the possibility of using Bessel-Gaussian beams and scanning them with the help of the developed deflector in laser ranging systems, wireless optical communication, and also in energy transmission over long distances. The presented results open up new prospects for creating highly efficient systems for spatial control of light beams.

Ropot P.I., Agashkov A.V., Varanetsky A.M., Kazakov V.I., Shakin O.V., Akimov S.V. Formation and two-coordinate scanning of Bessel-Gaussian beam by acousto-optic cells on paratellurite crystals. Information-measuring and Control Systems. 2025. V. 23. № 4. P. 49−56. DOI: https://doi.org/10.18127/j20700814-202504-06 (in Russian)

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