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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-1817</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>ОПТИЧЕСКИЕ МАТЕРИАЛЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>OPTICAL MATERIALS</subject></subj-group></article-categories><title-group><article-title>Термооптические свойства лазерных кристаллов KYbхY1–х(WO4)2</article-title><trans-title-group xml:lang="en"><trans-title>Thermooptic Properties of KYbхY1–x(WO4)2 Laser 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>Герцова</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Hertsova</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><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гурецкий</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Guretskii</surname><given-names>S. A.</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-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Карпинский</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Karpinsky</surname><given-names>D. V.</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-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Труханова</surname><given-names>Е. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Trukhanova</surname><given-names>K. L.</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-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Юмашев</surname><given-names>К. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Yumashev</surname><given-names>K. 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">kyumashev@bntu.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Научно-исследовательский центр оптических материалов и технологий Белорусского национального технического университета</institution></aff><aff xml:lang="en"><institution>Center for Optical Materials and Technologies, Belarusian National Technical University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>НПЦ НАН Беларуси по материаловедению</institution></aff><aff xml:lang="en"><institution>SSPA “Scientific Practical Materials Research Center of NAS of Belarus”</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>28</day><month>03</month><year>2025</year></pub-date><volume>92</volume><issue>2</issue><fpage>255</fpage><lpage>260</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Герцова А.В., Гурецкий С.А., Карпинский Д.В., Труханова Е.Л., Юмашев К.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Герцова А.В., Гурецкий С.А., Карпинский Д.В., Труханова Е.Л., Юмашев К.В.</copyright-holder><copyright-holder xml:lang="en">Hertsova A.V., Guretskii S.A., Karpinsky D.V., Trukhanova K.L., Yumashev K.V.</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/1817">https://zhps.ejournal.by/jour/article/view/1817</self-uri><abstract><p>Методом отклонения лазерного пучка в среде с линейным градиентом температуры для моноклинных кристаллов KYbxY1–x(WO4)2 (х = 0, 0.05, 0.1, 0.2, 0.5 и 1.0) исследованы температурные коэффициенты главных показателей преломления для поляризаций света E//Np, E//Nm и E//Ng на длине волны 1.06 мкм. Кристаллы KYbxY1–x(WO4)2 выращены модифицированным методом Чохральского с использованием динамического режима роста и подбором необходимого градиента температур на фронте кристаллизации. Полученные коэффициенты dn/dT для всех поляризаций света отрицательные, при этом их абсолютные значения уменьшаются с увеличением х. Показано, что коэффициенты dni/dT (i = p, m, g) для кристаллов KYbxY1–x(WO4)2 линейно зависят от коэффициента их стехиометрии х.</p></abstract><trans-abstract xml:lang="en"><p>Thermo-optic coefficients of monoclinic KYbxY1–x(WO4)2 (х = 0, 0.05, 0.1, 0.2, 0.5 и 1.0) crystals for E//Np, E//Nm и E//Ng light polarizations at wavelength of 1.06 μm were studied using laser beam deviation technique for a medium with a linear temperature gradient. KYbxY1–x(WO4)2 crystals were grown by the modified Czochralski method using a dynamic growth regime and selection of the required temperature gradient at the crystallisation front. The coefficients dn/dT obtained for all light polarizations are negative, and their absolute values decrease with increasing coefficient x. It is shown that the coefficients dni/dT (i = p, m, g) for KYbxY1–x (WO4)2 crystals depend linearly on their stoichiometry coefficient x.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>термооптические свойства</kwd><kwd>температурный коэффициент показателя преломления</kwd><kwd>кристаллы калий-иттриевых вольфраматов</kwd><kwd>лазерный кристалл</kwd><kwd>моноклинный кристалл</kwd><kwd>метод отклонения лазерного пучка</kwd></kwd-group><kwd-group xml:lang="en"><kwd>thermo-optic properties</kwd><kwd>thermo-optic coefficient</kwd><kwd>potassium-yttrium tungstate crystals</kwd><kwd>laser crystal</kwd><kwd>monoclinic crystal</kwd><kwd>laser beam deviation technique</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">F. Brunner, G. J. 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