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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">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-1484</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>ПРИБОРЫ И МЕТОДЫ СПЕКТРОСКОПИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>DEVICES AND METHODS OF SPECTROSCOPY</subject></subj-group></article-categories><title-group><article-title>Особенности вырожденного четырехволнового смешения в жидкокристаллической ячейке в режиме динамической фоторефрактивности</article-title><trans-title-group xml:lang="en"><trans-title>Peculiarities of Degenerate Four-Wave Mixing in a LiquidCrystal Cell in Dynamic Photorefractivity Mode</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>Агашков</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Agashkov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><email xlink:type="simple">a.agashkov@ifanbel.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>Варанецкий</surname><given-names>А. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Varanetski</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>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 НАН Беларуси</institution></aff><aff xml:lang="en"><institution>В. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>13</day><month>02</month><year>2024</year></pub-date><volume>91</volume><issue>1</issue><fpage>146</fpage><lpage>153</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Агашков А.В., Варанецкий А.М., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Агашков А.В., Варанецкий А.М.</copyright-holder><copyright-holder xml:lang="en">Agashkov A.V., Varanetski A.M.</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://zhps.ejournal.by/jour/article/view/1484">https://zhps.ejournal.by/jour/article/view/1484</self-uri><abstract><p>Исследованы особенности вырожденного четырехволнового смешения (ВЧВС) в нематической жидкокристаллической ячейке с фотопроводящими ориентирующими слоями. Для установления векторной диаграммы взаимодействия волн использован метод, в соответствии с которым на вход нелинейной среды подаются три плоские волны под углами друг к другу. Пробная волна интерферирует с двумя попутными волнами накачки, которые после прохождения ячейки отражаются в обратном направлении с помощью двух зеркал. Предложена векторная модель, хорошо согласующаяся с полученными экспериментальными результатами. Главное ее отличие от стандартной диаграммы ВЧВС заключается в том, что вектор решетки показателя преломления, на которой происходит эффективное обращение волнового фронта в режиме динамической фоторефрактивности, находится под углом к вектору оптической интерференционной решетки. Эксперимент в режиме динамической фоторефрактивности продемонстрировал коррекцию сферических и астигматических аберраций, эквивалентных действию линзы с фокусным расстоянием &lt;10 см.</p></abstract><trans-abstract xml:lang="en"><p>The features of degenerate four-wave mixing (DFWM) in a nematic liquid-crystal cell with photoconductive orienting layers are studied. To establish the vector diagram of the interaction of waves, a method was used according to which three plane waves at angles to each other are incident on the nonlinear medium. The probe wave interferes with two forward-pump waves, which, after passing through the cell, are reflected backward by two mirrors. A vector model is proposed that is in good agreement with the experimental results obtained. Its main difference from the standard DFWM diagram is that the vector of the refractive index grating, on which the wavefront is effectively conjugated in the dynamic photorefractivity mode, is at an angle to the vector of the optical interference grating. The experiment in the dynamic photorefractive mode demonstrated good correction of spherical and astigmatic aberrations, equivalent to the action of a lens with a focal length of less than 10 cm.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>вырожденное четырехволновое смешение</kwd><kwd>обращение волнового фронта</kwd><kwd>построение Эвальда</kwd><kwd>динамическая фоторефрактивность</kwd><kwd>нематический жидкий кристалл 6CHBT</kwd></kwd-group><kwd-group xml:lang="en"><kwd>degenerate four-wave mixing</kwd><kwd>wavefront reversal</kwd><kwd>Ewald construction</kwd><kwd>dynamic photorefractivity</kwd><kwd>6CHBT nematic liquid crystal</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">R. W. Hellwarth. J. Opt. Soc. Am., 67, N 1 (1977) 1-3</mixed-citation><mixed-citation xml:lang="en">R. W. Hellwarth. J. Opt. Soc. 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