Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Alexander G. Papashvili"'
Autor:
Dmitry P. Tereshchenko, Sergei N. Smetanin, Alexander G. Papashvili, Yury A. Kochukov, Anatoly I. Titov, Evgeny V. Shashkov, Maria D. Lapina, Vladislav E. Shukshin, Kirill A. Subbotin, Denis A. Lis
Publikováno v:
Crystals, Vol 13, Iss 4, p 636 (2023)
The effect of the self-separation of a single ultrashort light pulse of a parametric Raman CaMoO4 laser with birefringence phase matching under intracavity synchronous pumping by a mode-locked 1064 nm Nd:YAG laser is experimentally investigated and t
Externí odkaz:
https://doaj.org/article/e83e5e0b82ac4426b28ca7958619ca8d
Autor:
Dmitry P. Tereshchenko, Egor A. Peganov, Sergei N. Smetanin, Alexander G. Papashvili, Evgeny V. Shashkov, Lyudmila I. Ivleva, Elizaveta E. Dunaeva, Irina S. Voronina, Milan Frank
Publikováno v:
Crystals, Vol 12, Iss 4, p 495 (2022)
Multi-Stokes ultrashort pulse shapes and their relative positions of synchronously pumped stimulated Raman scattering (SRS) on combined primary and secondary vibrational modes in a BaWO4 crystal are investigated. An original method of its simultaneou
Externí odkaz:
https://doaj.org/article/be7e82f5b88d41b3830b44ac8fd560c2
Autor:
Jan Šulc, Lyudmila I Ivleva, E.E. Dunaeva, Maxim E. Doroshenko, Alexander G. Papashvili, Helena Jelínková, I.S. Voronina, Jan Kratochvíl
Publikováno v:
Journal of Crystal Growth. 513:10-14
The series of Tm3+/Ho3+ co-doped vanadates based on Ca3(VO4)2 was obtained by Czochralski method. The trivalent doping ions were introduced into the melt in the form of oxides without any additional compensating impurities. The spectroscopic investig
Autor:
Alexander G. Papashvili, A. N. Nakladov, O.K. Alimov, Maxim E. Doroshenko, Kseniia A. Pierpoint, V. A. Konyushkin
Publikováno v:
Journal of Luminescence. 208:475-478
The spectroscopic properties of Tm3+ optical centers at the 3F4-3H6 two-micron transition in CaF2-YF3:Tm3+ solid-solution crystals are studied by the selective laser excitation technique. The low-temperature (14 K, 77 K) time-resolved fluorescence sp
Autor:
Alexander G. Papashvili, Helena Jelínková, Lyudmila I Ivleva, Jan Kratochvíl, Jan Šulc, Maxim E. Doroshenko, I.S. Voronina
Publikováno v:
Journal of Luminescence. 205:482-486
The spectroscopic properties of Tm3+ ions in Ca3(VO4)2 crystal were investigated and diode pumped tunable lasing was demonstrated. The maximum absorption and emission cross-sections for E⊥c at 3F4-3H6 2 µm transition were calculated to be ~1 × 10
Publikováno v:
Journal of Crystal Growth. 501:18-21
Calcium orthovanadate crystals doped with Tm3+ ions were successfully grown by Czochralski method. The value of anomalous birefringence did not exceed of 1.3 × 10−5 cm−1 for as-grown samples. The effective segregation coefficient of Tm3+ in a va
Autor:
A.V. Nekhoroshikh, Maxim E. Doroshenko, Kseniia A. Pierpoint, V. A. Konyushkin, O.K. Alimov, Alexander G. Papashvili
Publikováno v:
2020 International Conference Laser Optics (ICLO).
Different Ho3+ ion optical centers in CaF 2 and SrF 2 crystals were separated and their spectroscopic properties at the 5I 8 ↔5I 7 laser 2.1 μm transition were investigated at 14K. For the first time room temperature lasing is obtained in Ho:SrF 2
Autor:
Jan Šulc, N. O. Kovalenko, Maxim E. Doroshenko, Helena Jelínková, Michal Němec, David Vyhlídal, Michal Jelínek, Alexander G. Papashvili, Igor S. Terzin, Adam Říha
Publikováno v:
OSA High-brightness Sources and Light-driven Interactions Congress 2020 (EUVXRAY, HILAS, MICS).
Laser-diode (~1.71 μm) pumped Zn1-xMnxSe:Cr2+,Fe2+ (x = 0.05) crystal through Cr2+→Fe2+ energy-transfer resulting in ~4.19 μm lasing within temperature range of 78–110 K, maximum mean laser output power of 4.1 mW, and slope-efficiency of 2.3% i
Autor:
Alexander G. Papashvili, I.S. Voronina, L. D. Iskhakova, Lyudmila I Ivleva, E.E. Dunaeva, Maxim E. Doroshenko
Publikováno v:
Journal of Crystal Growth. 563:126104
Calcium orthovanadate Ca3(VO4)2 crystals doped with manganese ions have been fabricated by high-temperature diffusion doping. Nominally pure CVO plates were prepared from the Czochralski grown single crystal. They were used as an effective matrix for
Publikováno v:
Journal of Luminescence. 184:44-47
Formation of three types of thulium optical centers is observed in SrMoO4 crystal doped with Tm3+ in the form of thulium niobate. Two types of optical centers are found to have quite similar spectroscopic properties, while the third one is characteri