A. A. Shavelev, A. S. Nizamutdinov, A. A. Shakirov, S. L. Korableva, D. G. Zverev, A. A. Rodionov, E. V. Lukinova, V. V. Semashko
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Abstract
Crystals of the UV lasers active media Ce3+:LiCaAlF6, which are characterized by the formation of several types of Ce3+ ion centers, have been studied. The presence of nonequivalent impurity centers was confirmed by detection of zero-phonon lines for two centers in low-temperature luminescence spectra, as well as from EPR spectra for various magnetic field orientations relative to the crystallographic axes of the samples. We have shown that for Ce3+:LiCaAlF6 crystals, with an increase in the concentration of Ce3+ ions in the melt , crystallization occurs in such a way that the concentration of impurity centers of lower symmetry increases to a greater extent than centers of higher symmetry . Moreover, laser oscillation belongs to precisely this type of center.
期刊介绍：
Bulletin of the Russian Academy of Sciences: Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It presents full-text articles (regular, letters to the editor, reviews) with the most recent results in miscellaneous fields of physics and astronomy: nuclear physics, cosmic rays, condensed matter physics, plasma physics, optics and photonics, nanotechnologies, solar and astrophysics, physical applications in material sciences, life sciences, etc. Bulletin of the Russian Academy of Sciences: Physics focuses on the most relevant multidisciplinary topics in natural sciences, both fundamental and applied. Manuscripts can be submitted in Russian and English languages and are subject to peer review. Accepted articles are usually combined in thematic issues on certain topics according to the journal editorial policy. Authors featured in the journal represent renowned scientific laboratories and institutes from different countries, including large international collaborations. There are globally recognized researchers among the authors: Nobel laureates and recipients of other awards, and members of national academies of sciences and international scientific societies.
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