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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">10.29235/1561-2430-2021-57-4-485-494</article-id><article-id custom-type="elpub" pub-id-type="custom">vestifm-618</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>Кристалл Yb3+:LuAlO3 как активная среда для пикосекундных лазеров с синхронизацией мод</article-title><trans-title-group xml:lang="en"><trans-title>The Yb3+:LuAlO3 crystal as an active medium for picosecond mode-locked lasers</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>Кисель</surname><given-names>В. Э.</given-names></name><name name-style="western" xml:lang="en"><surname>Kisel</surname><given-names>V. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кисель Виктор Эдвардович – кандидат физико-математических наук, заведующий научно-исследовательским центром оптических материалов и технологий</p><p>пр. Независимости, 65, 220013, г. Минск</p></bio><bio xml:lang="en"><p>Viktor E. Kisel – Ph. D. (Physics and Mathematics), Head of Research Center of Optical Materials and Technologies</p><p>65, Nezavisimosti Ave., 220013, Minsk</p></bio><email xlink:type="simple">vekisel@bntu.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>Кулешов</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuleshov</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кулешов Николай Васильевич – доктор физико-математических наук, профессор, заведующий кафедрой лазерной техники и технологии</p><p>пр. Независимости, 65, 220013, г. Минск</p></bio><bio xml:lang="en"><p>Nikolay V. Kuleshov – Dr. Sc. (Physics and Mathematics), Head of Laser Devices and Technology Department</p><p>65, Nezavisimosti Ave., 220013, Minsk</p></bio><email xlink:type="simple">nkuleshov@bntu.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>Ясюкевич</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Yasukevich</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ясюкевич Анатолий Сергеевич – кандидат физико-математических наук, ведущий научный сотрудникнаучно-исследовательского центра оптических материалов и технологий</p><p>пр. Независимости, 65, 220013, г. Минск</p></bio><bio xml:lang="en"><p>Anatoly S. Yasukevich – Ph. D. (Physics and Mathematics), Leading Researcher at the Research Center of Optical Materials and Technologies</p><p>65, Nezavisimosti Ave., 220013,  Minsk</p></bio><email xlink:type="simple">anatol@bntu.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский национальный технический университет</institution></aff><aff xml:lang="en"><institution>Belarussian National Technical University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>27</day><month>12</month><year>2021</year></pub-date><volume>57</volume><issue>4</issue><fpage>485</fpage><lpage>494</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кисель В.Э., Кулешов Н.В., Ясюкевич А.С., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Кисель В.Э., Кулешов Н.В., Ясюкевич А.С.</copyright-holder><copyright-holder xml:lang="en">Kisel V.E., Kuleshov N.V., Yasukevich A.S.</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/618">https://vestifm.belnauka.by/jour/article/view/618</self-uri><abstract><p>Проведено математическое моделирование и экспериментальное исследование режима несолитонной синхронизации мод в лазере на кристалле Yb3+:LuAlO3 с продольной накачкой излучением лазерного диода. Моделирование на основе уравнения Хауса (the Haus master equation) позволило определить требования к параметрам насыщающегося поглотителя (НП), уровню средней выходной мощности, размерам TEM00 моды резонатора в активном элементе и на затворе для получения стабильного режима генерации пикосекундных лазерных импульсов. Лазерные эксперименты проведены в четырехзеркальном Х-образном резонаторе с использованием полупроводникового насыщающегося зеркала (SESAM) в качестве пассивного затвора и лазерного диода с волоконным выходом максимальной мощностью до 30 Вт на длине волны 978,5 нм в качестве источника накачки. Получен стабильный режим пассивной синхронизации мод с максимальной средней выходной мощностью до 12 Вт и длительностью ультракоротких импульсов около 2 пс при оптической эффективности преобразования излучения накачки в излучение генерации около 38 %. Лазерные импульсы были получены на центральной длине волны около 999 нм с минимальным стоксовым сдвигом (около 2 %) по отношению к излучению накачки, что существенно снижало тепловую нагрузку на активном элементе. Дополнительно приведены предварительные результаты по генерации второй гармоники и синхронной накачке параметрического генератора света с использованием лазера на кристалле Yb3+:LuAlO3 в качестве источника накачки.</p></abstract><trans-abstract xml:lang="en"><p>Herein, we report on the mathematical modelling and experimental study of the regime of nonsoliton mode locking in a laser based on the Yb3+:LuAlO3 (Yb:LuAP) crystal with longitudinal pumping by laser diode radiation. Simulation based on the Haus master equation permitted to determine the requirements for the parameters of a saturable absorber (SA), the level of the average output power, the size of the TEM00 mode of the cavity in the active element and on the gate to obtain a stable regime of generation of picosecond laser pulses. Laser experiments were carried out in a fourmirror X-shaped resonator using a semiconductor saturable mirror (SESAM) as a passive modulator and a laser diode with a fiber output of a maximum power up to 30 W at a wavelength of 978.5 nm as a pump source. We obtained a stable passive mode locking with a maximum average output power of up to 12 W and an ultrashort pulse duration of about 2 ps at an optical conversion efficiency of pump radiation into lasing radiation of about 38 %. Laser pulses were obtained at a central wavelength of about 999 nm with a minimum Stokes shift (about 2 %) with respect to the pump radiation, which significantly reduced the thermal load on the active element. Additionally, the preliminary results on the second harmonic generation and synchronous pumping of a parametric light generator using a Yb3+ : LuAlO3 crystal laser as a pump source are presented.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>пикосекундный лазер</kwd><kwd>пассивная синхронизация мод</kwd><kwd>кристалл Yb3+:LuAlO3</kwd><kwd>полупроводниковое насыщающееся зеркало (SESAM)</kwd></kwd-group><kwd-group xml:lang="en"><kwd>picosecond laser</kwd><kwd>passive mode-locking</kwd><kwd>Yb:LuAP crystal</kwd><kwd>semiconductor saturable-absorber mirror (SESAM)</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">250 W average power, 100 kHz repetition rate cryogenic Yb:YAG amplifier for OPCPA pumping / L. E. Zapata [et al.] // Opt. Lett. – 2016. – Vol. 41, № 3. – P. 492–495. https://doi.org/10.1364/ol.41.000492</mixed-citation><mixed-citation xml:lang="en">Zapata L. 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