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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vestifm</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия физико-математических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-2430</issn><issn pub-type="epub">2524-2415</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-2430-2019-55-4-479-488</article-id><article-id custom-type="elpub" pub-id-type="custom">vestifm-486</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>Особенности акустооптического взаимодействия оптических и акустических бесселевых пучков в поперечно изотропных оптически положительных кристаллах</article-title><trans-title-group xml:lang="en"><trans-title>Some features of acousto-optic interaction of optical and acoustic Bessel beams in transversely isotropic optically positive crystals</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Белый</surname><given-names>В. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Belyi</surname><given-names>V. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Белый Владимир Николаевич – член-корреспондент, доктор физико-математических наук, заведующий центром «Диагностические системы».</p><p>пр. Независимости, 68-2, 220072, г. Минск</p></bio><bio xml:lang="en"><p>Vladimir N. Belyi – Corresponding Member, Dr. Sc. (Physics and Mathematics), Professor, Head of the Center ”Diagnostic Systems”.</p><p>68-2, Nezavisimosti Ave., 220072, Minsk</p></bio><email xlink:type="simple">v.belyi@dragon.bas-net.by</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хило</surname><given-names>П. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Khilo</surname><given-names>P. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хило Петр Анатольевич – доктор физико-математических наук, профессор, заведующий кафедрой общей физики.</p><p>пр. Октября, 48, 246746, г. Гомель</p></bio><bio xml:lang="en"><p>Piotr A. Khilo – Dr. Sc. (Physics and Mathematics), Professor, Head of the Department of General Physics.</p><p>48, Oktyabrya Ave., 48, 246746, Gomel</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Казак</surname><given-names>Н. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kazak</surname><given-names>N. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Казак Николай Станиславович – академик, доктор физико-математических наук, главный научный сотрудник.</p><p> </p></bio><bio xml:lang="en"><p>Nikolai S. Kazak – Academician, Dr. Sc. (Physics and Mathematics), Chief Scientific Researcher.</p><p>68-2, Nezavisimosti Ave., 220072, Minsk</p></bio><email xlink:type="simple">lod@dragon.basnet.by</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хило</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Khilo</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хило Николай Анатольевич – кандидат физико- математических наук, ведущий научный сотрудник.</p><p>пр. Независимости, 68-2, 220072, г. Минск</p></bio><bio xml:lang="en"><p>Nikolai A. Khilo – Ph. D. (Physics and Mathematics), Leading Scientific Researcher.</p><p>68-2, Nezavisimosti Ave., 220072, Minsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт физики им. Б. И. Степанова Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Гомельский государственный технический университет им. П. О. Сухого</institution></aff><aff xml:lang="en"><institution>Sukhoi State Technical University of Gomel</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>07</day><month>01</month><year>2020</year></pub-date><volume>55</volume><issue>4</issue><fpage>479</fpage><lpage>488</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Белый В.Н., Хило П.А., Казак Н.С., Хило Н.А., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Белый В.Н., Хило П.А., Казак Н.С., Хило Н.А.</copyright-holder><copyright-holder xml:lang="en">Belyi V.N., Khilo P.A., Kazak N.S., Khilo N.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vestifm.belnauka.by/jour/article/view/486">https://vestifm.belnauka.by/jour/article/view/486</self-uri><abstract><p>Исследованы особенности акустооптической (АО) дифракции с участием бесселевых светового и акустического пучков в анизотропных кристаллах. Рассмотрены кристаллы гексагональной симметрии, которые являются оптически положительными, а акустически – поперечно изотропными. Показано, что в отличие от случая АО дифракции плоских волн, переход к бесселевым пучкам позволяет реализовать ряд новых каналов дифракции, имеющих специфические конфигурации волновых векторов взаимодействующих волн при сохранении аксиальной симметрии оптической схемы в целом. Проведена классификация каналов дифракции для анизотропного рассеяния и для них рассчитаны основные параметры рассеянного бесселева светового пучка и параметры бесселева акустического пучка. Обнаружена возможность реализации изотропного типа дифракции, что позволяет повысить эффективность АО преобразования. Определены его характеристики для двух каналов рассеяния, а именно, рассеяния на попутном бесселевом акустическом пучке и на обратном.</p><p>Из-за многообразия каналов рассеяния, а также с учетом того, что бесселевы световой и акустический пучки обладают винтовыми дислокациями волнового фронта, а также подавленным дифракционным расплыванием, изучение особенностей АО дифракции таких пучков в оптически положительных кристаллах представляет как научный, так и практический интерес. </p></abstract><trans-abstract xml:lang="en"><p>Some basic properties of acousto-optical (AO) diffraction involving Bessel light and acoustic beams in anisotropic crystals are investigated. Hexagonal symmetry crystals are considered and are optically uniaxial and positive and acoustically transversely isotropic. It is shown that, unlike the case of AO diffraction of plane waves, the transition to Bessel beams allows one to realize a number of new diffraction channels having specific configurations of the wave vectors of interacting waves while maintaining the axial symmetry of the optical scheme as a whole. The diffraction channels for anisotropic scattering are classified and the main parameters of the scattered Bessel light beam and the parameters of the Bessel acoustic beam are calculated for each of them. The possibility of implementing the isotropic-type diffraction was revealed, which makes it possible to increase the efficiency of AO conversion. The parameters of this-type diffraction are determined for two scattering channels, namely, for scattering by a direct Bessel acoustic beam and by a backward propagating acoustic beam.</p><p>Due to the appearance of a set of scattering channels and with regard to the fact that Bessel light and acoustic beams have helical wave front dislocations, as well as suppressed diffraction spreading, the study of the features of AO diffraction of such beams in optically positive crystals has both a scientific and practical interest. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>бесселевы световые пучки</kwd><kwd>бесселевы акустические пучки</kwd><kwd>акустооптическая дифракция</kwd><kwd>оптически положительные кристаллы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Bessel light beams</kwd><kwd>Bessel acoustic beams</kwd><kwd>acousto-optic diffraction</kwd><kwd>optically positive crystals</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Formation of TH- and TE-polarized Bessel light beams at acousto- optic diffraction in anisotropic crystals / V. 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