V
Vladimir B. Tsvetkov
Researcher at Russian Academy of Sciences
Publications - 219
Citations - 1840
Vladimir B. Tsvetkov is an academic researcher from Russian Academy of Sciences. The author has contributed to research in topics: Laser & Fiber laser. The author has an hindex of 22, co-authored 183 publications receiving 1402 citations. Previous affiliations of Vladimir B. Tsvetkov include National Research Nuclear University MEPhI & Russian Academy.
Papers
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Journal ArticleDOI
On the origin of near-IR luminescence in Bi-doped materials (II). Subvalent monocation Bi+ and cluster Bi5(3+) luminescence in AlCl3/ZnCl2/BiCl3 chloride glass
Alexey N. Romanov,Z. T. Fattakhova,Alexander Veber,O. V. Usovich,E. V. Haula,Vladimir N. Korchak,Vladimir B. Tsvetkov,Lev A. Trusov,Pavel E. Kazin,Vladimir B. Sulimov +9 more
TL;DR: Broadband NIR photoluminescence (from 1000 to 2500 nm) was observed from partially reduced AlCl₃/ZnCl ₂/BiCl⁂/ bi₅³⁺ glass, containing subvalent bismuth species.
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Properties and biological impact of RNA G-quadruplexes: from order to turmoil and back.
Prakash Kharel,Gertraud Becker,Vladimir B. Tsvetkov,Vladimir B. Tsvetkov,Pavel Ivanov,Pavel Ivanov +5 more
TL;DR: The landscape of rG4s within the transcriptome is reviewed, their potential impact on biological processes are focused on, and an emerging connection of these functions in human health and disease is considered.
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The expanding repertoire of G4 DNA structures
Anna M. Varizhuk,Dmitry S. Ischenko,Vladimir B. Tsvetkov,Roman A. Novikov,Nikolay A. Kulemin,Dmitry N. Kaluzhny,Maria Vlasenok,Vladimir Naumov,Igor P. Smirnov,Galina E. Pozmogova +9 more
TL;DR: It is suggested that, similar to classical G4s, imperfect G 4s could be considered as potential regulatory elements, pathology biomarkers and therapeutic targets, reflecting the enhanced sequential diversity of these motifs.
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Holmium fiber laser based on the heavily doped active fiber
Andrei S Kurkov,E.M. Sholokhov,Oleg I. Medvedkov,Vladislav Dvoyrin,Yu. N. Pyrkov,Vladimir B. Tsvetkov,A V Marakulin,L A Minashina +7 more
TL;DR: In this article, the spectral efficiency of a set of fiber lasers based on Ho-doped fiber with high concentration of the active ions was determined, and the highest output power of 4.2 W was detected at 2.1 μm with the efficiency slope of 34%.
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Spectral properties and NIR photoluminescence of Bi+ impurity in CsCdCl3 ternary chloride
Alexey N. Romanov,Alexander Veber,Z. T. Fattakhova,D. N. Vtyurina,Mikhail S. Kouznetsov,Ksenia S. Zaramenskikh,Igor S. Lisitsky,Vladimir N. Korchak,Vladimir B. Tsvetkov,Vladimir B. Sulimov +9 more
TL;DR: In this paper, the absorption spectrum is assigned to optical transitions of A → E type in two nonequivalent Bi + positions of D 3h and C 3v symmetry and the possibility of Jahn-Teller effect in Bi + excited states of E type is discussed in relation with absorption and luminescence excitation spectra properties.