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Information × Registration Number 0226U001699, (0123U101198) , R & D reports Title The development of a method for obtaining single crystals of yttrium-aluminum garnet with a controlled distribution of dopant ions for powerful laser radiation sources popup.stage_title Розробка методу отримання монокристалів ітрій-алюмінієвого гранату з керованим розподілом іонів допанту для потужних джерел лазерного випромінювання Head Nizhankovskyi Serhii V., Кандидат технічних наук Registration Date 29-01-2026 Organization Institute of Single Crystals of the National Academy of Sciences of Ukraine popup.description1 Тhe creation of the scientific basis of the technology for obtaining yttrium-aluminum garnet (YAG) crystals with a controlled distribution of neodymium (Nd3+) and samarium (Sm3+) ions for the manufacture of combined active elements of powerful IR laser radiation sources. popup.description2 As a result of the research, the physical and technological foundations of growing gradient-doped single crystals of YAG:Nd, YAG:Yb and YAG:Sm by the “iridium-free” technology of the horizontal directed crystallization (HDC) method in a protective reducing atmosphere based on Ar+(CO, H2) using thin-walled molybdenum crucibles were developed. For the first time, a new method for growing gradient-doped crystals using the HDC method with a double crucible as a source for feeding the melt has been proposed and implemented. This allows for more flexible and wider control of the concentration gradient and parameters of the dopant distribution profile. The optical and spectral characteristics, crystal and defect structure, dopant distribution parameters depending on the growth conditions were studied, In particular, it was found that the two-color color of YAG crystals with the formation of broad absorption bands (380-500 nm, 550-750 nm) is determined by intrinsic centers that arise as a result of non-stoichiometric evaporation of the melt, and include antistructural defects (YAl), cationic and anionic vacancies, as well as complexes associated with them: F+–VAl, F+–YAl, O––YAl. The laser tests of the obtained crystals were conducted, which proved the prospects of the developed technologies and the possibility of practical application of crystals for obtaining optical elements-suppressors (YAG:Sm) of active elements (gradient-doped YAG:Nd, YAG:Yb) with increased generation and improved thermo-optical characteristics, including new type of combined YAG:Nd/YAG:Sm elements with a gradient distribution of active neodymium ions for creating powerful and efficient diode-pumped solid-state lasers. Product Description popup.authors Oleksii M. SHEKHOVTSOV Olena O. VOVK Sergiy I. KRYVONOGOV Pavlo V. KONEVSKYY Serhii V. NIZHANKOVSKYI Maksym V. KOMPANIYETS Mykola B. YOLKIN Oleh O. LUKIIENKO Stanislav M. SKORYK Yurii V. SIRYK Kateryna P. BURTSEVA Vitalii L. NADTOCHAIEV Viacheslav V. BARANOV Andrii O. ROMANENKO Andrii I. HAIDUK Mykola I. MARCHENKO Nataliia S. SIDELNIKOVA Ihor M. DUBTSOV Vitalii MAKOVIYCHUK Yevhenii V. BOCHAROV Anatolii A. KOZLOVSKYY Andrii I. ENA Olena M. YERMOLENKO Oleh M. VOVK Olena M. NAUMENKO Yurii A. LYUBCHYCH Oleksandr Y. SERDIUK Oleksandr M. SHEYIN Evhenii V. SLIUNIN Oleksandr T. BUDNIKOV Bohdan Y. KUTS Inna A. EFYMENKO Oleksandr V. VOLOSHYN Leonid O. GRYN Oleksandr H. TRUSHKOVSKYI Viktor A. SHTITELMAN Volodymyr F. BOCHKOV Alla K. PESETSKA Valentyna M. MAKLIAK Yurii Y. SERIKOV popup.nrat_date 2026-01-29 Close