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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">ntv</journal-id><journal-title-group><journal-title xml:lang="ru">Научно-технический вестник информационных технологий, механики и оптики</journal-title><trans-title-group xml:lang="en"><trans-title>Scientific and Technical Journal of Information Technologies, Mechanics and Optics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-1494</issn><issn pub-type="epub">2500-0373</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17586/2226-1494-2023-23-3-448-454</article-id><article-id custom-type="elpub" pub-id-type="custom">ntv-4</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 СИСТЕМЫ И ТЕХНОЛОГИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>OPTICAL ENGINEERING</subject></subj-group></article-categories><title-group><article-title>Модель чувствительного элемента рефрактивного волоконно-оптического сенсора на основе MMF-SMF-MMF структуры с использованием поверхностного плазмонного резонанса</article-title><trans-title-group xml:lang="en"><trans-title>A model of a refractive fiber optic sensor sensing element based on MMF-SMF-MMF structure using surface plasmon resonance</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8251-7625</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ивойлов</surname><given-names>К. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Ivoilov</surname><given-names>K. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ивойлов Кирилл Антонович — инженер </p><p>Санкт-Петербург, 197101 </p></bio><bio xml:lang="en"><p>Kirill A. Ivoilov — Engineer </p><p>Saint Petersburg, 197101 </p></bio><email xlink:type="simple">kirivoilov@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1320-6553</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гагаринова</surname><given-names>Д. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Gagarinova</surname><given-names>D. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гагаринова Диана Олеговна — инженер </p><p>Санкт-Петербург, 197101 </p></bio><bio xml:lang="en"><p>Diana O. Gagarinova — Engineer </p><p>Saint Petersburg, 197101 </p></bio><email xlink:type="simple">dogagarinova@itmo.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8021-0678</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зыкина</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zykina</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Зыкина Аделия Алексеевна — инженер </p><p>Санкт-Петербург, 197101 </p></bio><bio xml:lang="en"><p>Adeliia A. Zykina — Engineer </p><p>Saint Petersburg, 197101 </p></bio><email xlink:type="simple">adeliya.zykina@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3470-1000</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мешковский</surname><given-names>И. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Meshkovskiy</surname><given-names>I. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мешковский Игорь Касьянович — доктор технических наук, профессор, профессор, главный научный сотрудник</p><p>sc 6603640937 </p><p>Санкт-Петербург, 197101 </p></bio><bio xml:lang="en"><p>Igor K. Meshkovskiy — D.Sc., Full Professor, Chief Researcher </p><p>sc 6603640937 </p><p>Saint Petersburg, 197101 </p></bio><email xlink:type="simple">igorkm@itmo.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5764-0960</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Плясцов</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Plyastsov</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Плясцов Семён Алексеевич — кандидат технических наук, заведующий лабораторией, научный сотрудник</p><p>sc 57195587476 </p><p>Санкт-Петербург, 197101 </p></bio><bio xml:lang="en"><p>Semyon A. Plyastsov — PhD, Head of Laboratory, Scientific Researcher </p><p>sc 57195587476 </p><p>Saint Petersburg, 197101 </p></bio><email xlink:type="simple">plyastsov@itmo.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Университет ИТМО</institution><country>Россия</country></aff><aff xml:lang="en"><institution>ITMO University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>10</day><month>12</month><year>2024</year></pub-date><volume>23</volume><issue>3</issue><fpage>448</fpage><lpage>454</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ивойлов К.А., Гагаринова Д.О., Зыкина А.А., Мешковский И.К., Плясцов С.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Ивойлов К.А., Гагаринова Д.О., Зыкина А.А., Мешковский И.К., Плясцов С.А.</copyright-holder><copyright-holder xml:lang="en">Ivoilov K.A., Gagarinova D.O., Zykina A.A., Meshkovskiy I.K., Plyastsov S.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://ntv.elpub.ru/jour/article/view/4">https://ntv.elpub.ru/jour/article/view/4</self-uri><abstract><p>Введение. Представлена математическая модель чувствительного элемента рефрактометрического волоконнооптического датчика, принцип действия которого основан на явлении поверхностного плазмонного резонанса. Конструкция чувствительного элемента представляет собой последовательное соединение многомодового (MMF), одномодового (SMF) и многомодового волокон, образующих MMF-SMF-MMF структуру. SMF-участок покрыт тонкой пленкой золота. Метод. Для моделирования элемента применен подход, используемый при расчете классической конфигурации Кречмана для объемных оптических структур. Показатель преломления волокна рассчитан на основе уравнения Селлмейера, а показатель преломления золота определен с использованием модели Друдэ. Результаты моделирования сопоставлены с экспериментально полученными спектрами пропускания изготовленных образцов чувствительных элементов. Основные результаты. Для апробации модели изготовлены чувствительные элементы волоконно-оптических датчиков со следующими параметрами: диаметры сердцевин многомодового волокна 62,5 мкм, одномодового волокна — 9 мкм, покрытие SMF-участка пленкой из золота толщиной 50 нм. Получены спектры пропускания чувствительных элементов волоконно-оптических датчиков в водных растворах глюкозы различной концентрации. Продемонстрировано, что предложенная модель хорошо описывает полученные в результате экспериментов спектры пропускания чувствительных элементов на основе MMF-SMF-MMF структур в области поверхностного плазмонного резонанса. Обсуждение. Разработанная модель может найти применение при оптимизации конструкции чувствительного элемента рефрактометрических волоконно-оптических датчиков с целью повышения чувствительности. Модель может быть использована при разработке алгоритма опроса чувствительных элементов на основе волоконных MMF-SMF-MMF структур.</p></abstract><trans-abstract xml:lang="en"><p>This paper presents a mathematical model of the sensitive element of a refractometric fiber-optic sensor the principle of operation of which is based on the phenomenon of surface plasmon resonance. The sensing element design is a sequential connection of a multimode fiber (MMF), a single-mode fiber (SMF), and a multimode fiber forming an MMF-SMF-MMF structure. The SMF site is coated with a thin film of gold. To model the element, the approach used in calculating the classical Kretschmann configuration for volumetric optical structures was applied. The refractive index of the fiber is calculated based on the Sellmeyer equation, and the refractive index of the gold is determined using the Drude model. The simulation results are compared with experimentally obtained transmission spectra of fabricated samples of sensing elements. For approbation of the model, the sensing elements of fiber-optic sensors with the following parameters are made: core diameter of multimode fiber 62.5 μm, core diameter of singlemode fiber 9 μm, coating SMF-segment with 50 nm gold film. Transmission spectra of fiber-optic sensor sensing elements in aqueous glucose solutions of various concentrations were obtained. It is demonstrated that the proposed model describes well the experimentally obtained transmission spectra of sensitive elements based on MMF-SMF-MMF structures in the region of surface plasmon resonance. The proposed model can be used to optimize the design of the sensitive element of refractometric fiber-optic sensors in order to increase the sensitivity. The proposed model implies its use in the development of an algorithm for interrogation of sensing elements based on fiber MMF-SMF-MMF structures.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>поверхностный плазмонный резонанс</kwd><kwd>гетеросердцевинная структура</kwd><kwd>оптоволоконный датчик</kwd><kwd>измерение показателя преломления</kwd></kwd-group><kwd-group xml:lang="en"><kwd>surface plasmon resonance</kwd><kwd>heterocore structure</kwd><kwd>fiber optic sensor</kwd><kwd>refractive index measurement</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">Homola J. Surface plasmon resonance sensors for detection of chemical and biological species // Chemical Reviews. 2008. V. 108. N 2. P. 462–493. https://doi.org/10.1021/cr068107d</mixed-citation><mixed-citation xml:lang="en">Homola J. 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