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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">izmertech</journal-id><journal-title-group><journal-title xml:lang="ru">Измерительная техника</journal-title><trans-title-group xml:lang="en"><trans-title>Izmeritel`naya Tekhnika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-1025</issn><issn pub-type="epub">2949-5237</issn><publisher><publisher-name>ФГУП "ВНИИФТРИ"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32446/0368-1025it.2018-12-27-32</article-id><article-id custom-type="elpub" pub-id-type="custom">izmertech-917</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>ОПТИКО-ФИЗИЧЕСКИЕ ИЗМЕРЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>OPTICOPHYSICAL MEASUREMENTS</subject></subj-group></article-categories><title-group><article-title>Измерение эффективности детектирования счётчиков одиночных фотонов на базе лавинных фотодиодов методом спонтанного параметрического рассеяния с асимметричными по спектру каналами</article-title><trans-title-group xml:lang="en"><trans-title>Measurement of the detection efficiency of single-photon counters based on avalanche photodiodes using the spontaneous parametric down-conversion method with spectrally asymmetric channels</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>Гостев</surname><given-names>П. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Gostev</surname><given-names>P. P.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</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>Агапов</surname><given-names>Д. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Agapov</surname><given-names>D. N.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</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>Дёмин</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Demin</surname><given-names>A. V.</given-names></name></name-alternatives><email xlink:type="simple">demin@vniiofi.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Левин</surname><given-names>Г. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Levin</surname><given-names>G. G.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мамонов</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Mamonov</surname><given-names>E. A.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</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>Магницкий</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Magnitskiy</surname><given-names>S. A.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Международный лазерный центр МГУ им. М,В, Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>International Laser Center, M.V. Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Всероссийский научно-исследовательский институт оптико-физических измерений</institution><country>Россия</country></aff><aff xml:lang="en"><institution>The All-Russian Research Institute for Optical and Physical Measurements</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>07</day><month>02</month><year>2023</year></pub-date><volume>0</volume><issue>12</issue><fpage>27</fpage><lpage>32</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ФГУП "ВНИИФТРИ", 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">ФГУП "ВНИИФТРИ"</copyright-holder><copyright-holder xml:lang="en">ФГУП "ВНИИФТРИ"</copyright-holder><license xlink:href="https://www.izmt.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.izmt.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.izmt.ru/jour/article/view/917">https://www.izmt.ru/jour/article/view/917</self-uri><abstract><p>Рассмотрена частотно-диафрагменная методика одновременного безэталонного измерения эффективности детектирования двух счётчиков одиночных фотонов. Методика основана на известной схеме измерения эффективности детектирования одиночных фотонов с помощью фотонных пар, генерируемых в нелинейном кристалле при спонтанном параметрическом рассеянии. Специфической особенностью рассматриваемой методики является использование асимметричных по спектру оптических каналов. Описана экспериментальная установка, реализующая методику в вырожденном режиме спонтанного параметрического рассеяния. Приведены результаты одновременного измерения эффективности детектирования двух счётчиков одиночных фотонов на длине волны 810 нм. Счётчики выполнены на основе кремниевых лавинных фотодиодов SAP-500 с волоконными входами. Показано, что рассматриваемая методика может быть использована и для измерения эффективности детектирования счётчиков одиночных фотонов, чувствительных в более длинноволновой области спектра. Предложенная методика по сравнению с диафрагменной схемой имеет преимущество в простоте и надёжности юстировки.</p></abstract><trans-abstract xml:lang="en"><p>The frequency-diaphragm technique of standardless measurement of the photon detection efficiency simultaneously of two single-photon detectors is considered. The technique is based on the well-known каmeasurement of the detection efficiency using photon pairs generated in a nonlinear crystal during spontaneous parametric scattering. A specific feature of the considered technique is the use of spectrally asymmetric channels. An experimental setup that implements the technique in the degenerate mode of spontaneous parametric scattering is described. The results of the simultaneous measurement of the detection efficiency of two single-photon detectors at a wavelength of 810 nm are presented. The detectors are made on the basis of silicon avalanche photodiodes SAP-500 with fiber inputs. It is shown that the considered technique can also be used to measure the detection efficiency of single-photon detectors sensitive in the longer wavelength region of the spectrum. . The proposed method, compared with a purely diaphragm scheme, has the advantage in simplicity and reliability of alignment.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>счётчики одиночных фотонов</kwd><kwd>спонтанное параметрическое рассеяние</kwd><kwd>квантовая эффективность</kwd><kwd>эффективность детектирования фотонов</kwd><kwd>single photon counters</kwd><kwd>spontaneous parametric scattering</kwd><kwd>quantum efficiency</kwd><kwd>photon detection efficiency</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">Магницкий С. А., Фроловцев Д. Н., Агапов Д. П., Дёмин А. В., Крутиков В. Н., Левин Г. Г. 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