Zobrazeno 1 - 10
of 25
pro vyhledávání: '"N. M. Polozkov"'
Autor:
I.S. Voronina, Lyudmila I Ivleva, N. M. Polozkov, V. V. Osiko, Tasoltan T. Basiev, Petr G. Zverev
Publikováno v:
Optical Materials. 23:439-442
Results on the growth technique, spectral and luminescence characteristics of Nd3+ ions in SrWO4 Raman crystals are presented. Optimal conditions to obtain optically homogeneous single crystals free of light scattering centers and growth striations w
Autor:
Manfred Wöhlecke, V. Salobutin, P. A. Lykov, T. R. Volk, Lyudmila I Ivleva, N. M. Polozkov, R. Pankrath
Publikováno v:
Optical Materials. 18:179-182
Doping strontium–barium niobate (SBN) crystals with rare earth (RE) impurities strongly lowers the ferroelectric phase transition T c which results in a significant enhancement of the dielectric permittivity and electrooptic coefficients and in a s
Publikováno v:
Scopus-Elsevier
The influence of doping of the SrxBa1−xNb2O6 (x=0.61) crystals (SBN-0.61) by rare-earth element (RE) dopants has been investigated. Taking into account the data available in the literature, it is demonstrated that the introduction of all rare-earth
Autor:
N. M. Polozkov, Tasoltan T. Basiev, Vyacheslav V Osiko, Petr G. Zverev, Alexander A. Sobol, Vadim V. Skornyakov, Lyudmila I Ivleva
Publikováno v:
Quantum Electronics. 30:55-59
Results on spontaneous Raman spectroscopy of alkaline-earth tungstate crystals are presented. The frequency of the modes active in stimulated Raman scattering (SRS) modes was found to increase and their width to decrease with increasing cation radius
Publikováno v:
Scopus-Elsevier
The two-wave interaction (at {lambda} = 488 nm) in strontium barium niobate crystals doped with cobalt ions (Co:SBN) was studied. The experimental dependences of the gain coefficient on the grating period and of the grating response time on the writi
Publikováno v:
Optical Materials. 4:168-173
The Stepanov technique has been developed for SBN solid-solution crystal growth. We carried out a comparison of the growth conditions of SBN crystals in the traditional Czochralski method and new growing technique. The advantages of the Stepanov tech
Publikováno v:
Journal of Crystal Growth. :700-702
We report on the growth and ferroelectric properties of SBN-0.61 doped with 0.25 and 0.5 wt% Nd2O3. Nd-doping leads to a strong lowering of the phase transition temperature and consequent increase of certain parameters. Dielectric hysteresis loops re
Publikováno v:
Soviet Journal of Quantum Electronics. 22:410-414
Most photorefractive crystals suitable for four-wave systems of phase self-conjugation and mutual conjugation have a fairly high level of light-induced scattering (fanning). This may imply that the nonlinearity of a crystal is too strong for optimal
Autor:
Lyudmila I Ivleva, N. M. Polozkov
Publikováno v:
Journal of Crystal Growth. 104:84-87
This paper is concerned with the growth of single crystals of Ca 3 (Nb,Ga) 2 Ga 3 O 12 (CNGG) by Stepanov's technique. The growth of this garnet crystal was investigated in an apparatus using RF heating, platinum crucibles and dies, and atmospheres o
Publikováno v:
2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666).
This paper investigated the modification of ferroelectric, photorefractive and photochromic properties of SBN crystals by means of introduction of the transition metals into the matrix. The two- and four-wave interaction in the crystals doped with Co