Vikentiy Vikentievich Tarkovsky
@grsu.by
Department of Theoretical Physics and Thermal Engineering / Faculty of Physics and Technology
Yanka Kupala State University of Grodno
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
S. S. Anufrik, V. V. Tarkovsky, and S. N. Anuchin
Springer Science and Business Media LLC
V. V. Tarkovskii, S. S. Anufrik, A. O. Romashkevich, and P. R. Makei
Allerton Press
V.V. Tarkovsky, S.S. Anufrik, and V.Yu. Kurstak
IOP Publishing
Abstract We examine the effect of the pump-induced loss in the gain medium of a Rhodamine 6G laser on the spectral dependence of the laser efficiency under microsecond coherent pumping. It is shown theoretically and experimentally that the pump-induced loss is mainly due to nonlinear refraction and thermo-optic inhomogeneities of the gain medium, which produce a negative thermal lens, whose defocusing effect reduces the laser efficiency. The induced absorption by excited-state singlet and triplet levels of dye molecules is shown to make no significant contribution to changes in laser efficiency. The pump-induced thermal loss at the peak absorption wavelength of Rhodamine 6G plays a more important role well above the threshold pump power density (γ ⩾ 5). We demonstrate that the maximum dye laser efficiency under microsecond coherent pumping can only be achieved at an optimal pump wavelength.
S. S. Anufrik, S. N. Anuchin, and V. V. Tarkovskii
Pleiades Publishing Ltd
S.S. Anufrik, V.Yu. Kurstak, and V.V. Tarkovsky
IEEE
Dependence of efficiency of generation of the dye laser from a wave length of a pumping radiation of microsecond duration is explored. It is shown, that the given effect is caused by effect of the thermal lens induced by a pumping radiation in the active medium of the laser.
T. N. Kopylova, S. S. Anufrik, G. V. Mayer, T. A. Solodova, E. N. Tel’minov, K. M. Degtyarenko, L. G. Samsonova, R. M. Gadirov, S. Yu. Nikonov, E. N. Ponyavina,et al.
Springer Science and Business Media LLC
S. S. Anufrik, V. V. Tarkovsky, G. G. Sazonko, and M. M. Asimov
Springer Science and Business Media LLC
S. S. Anufrik and V. V. Tarkovsky
Springer Science and Business Media LLC
S. S. Anufrik, M. F. Koldunov, A. A. Manenkov, and V. V. Tarkovskii
Springer Science and Business Media LLC
V. V. Tarkovskiĭ and S. S. Anufrik
Pleiades Publishing Ltd
S. S. Anufrik, M. I. Ihnatouski, M. F. Koldunov, A. M. Lyalikov, A. A. Manenkov, and V. V. Tarkovsky
SPIE
Structural and optical characteristics of polymer-filled nanoporous glass (PFNPG) composite was studied with holographic interferometry and atomic-force microscopy methods. A high homogeneity of the bulk PFNPG samples and their surfaces has been found. Light scattering in the samples was investigated. Rather low scattering losses have been observed in spite of heterogeneous structure of the composite. This result is discussed on a base of the Rayleigh scattering model. Lasing properties including a pump-to-laser conversion efficiency and a life time due to photodestruction of PFNPG samples activated with pyrromethene dyes are reported.
V. Tarkovsky and S. Anufrik
SPIE
The efficiency of splitting of renal rocks is studied with the usage of four schemes of the laser construction, generating momentums of microsecond duration. The dependence of deleting of the concrete renal rock substance on spectral content of radiation of microsecond duration in the range of 460-1064 nm has been established.
V. Tarkovsky, S. Anufrik, M. Koldunov, and A. Manenkov
SPIE
The optimum conditions of excitation in a two-spool laser are determined, in which the pumping of a solid laser on the basis of nanoporous glass - polymer composite with the inserted dyes is made by a laser on dyes emission with a lamp pumping of microsecond duration, which provides overlapping of a broad spectral range with laser momentums with energy up to 500 mJ at the duration of 1 mcs and the divergence of 1 millirad and the increase of the radiance in 140-700 times.
S. S. Anufrick, V. V. Tarkovski, Y. M. Kuzniatsou, and V. M. Nikitchenko
SPIE
Discovery generation of new laser dyes on the basis of quinolisinocoumarin's derivatives in a spectral range 490-580 nm. It is exhibited, that the greatest generative efficiency and photodurability the availability for given compoundes in the third standing coumarin's basis of the strong electron acceptor, for example carbamyl-, benzimidozoli- and benzthiazolyl-groups, and in a standing seven - electron donor N-(CH2) 6 groups. Given quinolisinocoumarin's derivatives have high generative efficiency which exceeds known laser dyes in 2-3 times. Thus the photochemical stability exceeds rhodamine 6G on the order.
S. S. Anufrick, M. F. Koldunov, Yu. M. Kuznetsov, A. A. Manenkov, E. P. Ponomarenko, and V. V. Tarkovsky
SPIE
A polymer-filled nanoporous glass composite (PFNPG) has been shown recently to be a very attractive host material for solid-state dye lasers. In particular, a high-conversion (lasing) efficiency, up to 70%, has been demonstrated for pyrromethene-family dyes impregnated to PFNPG, in a visible spectral range at 2-nd harmonic nanosecond pulse duration Nd:YAG laser excitation. For development of PFNPG-based dye lasers it is important to investigate lasing characteristics of this type matrices at various excitation (pump) wavelengths. In this context we have investigated the conversion efficiency, η, and emission spectra, fem, of phenolemine 512 (Ph 512) and pyromethene 580 (PM 580) dyes impregnated into PFNPG, at excitation wavelengths, λp, varied in a range of their main absorption bands. A microsecond pulse duration liquid solution dye laser was used in our experiments as a pump source. The conversion efficiency, η=32% and 47%, has been observed at λ=525 nm for Ph 512 and PM 580 respectively with output energy as high as 250 mJ. "Anomalous" dependencies of η and fem upon λp have been revealed for both dyes. In particular, two-frequency lasing has been observed for Ph 5 12 at λ=535 nm. Mechanism of the lasing anomalies is supposed to be related to photoinduced absorption in lasing dyes.
V V Tarkovsky, V Yu Kurstak, and S S Anufrik
IOP Publishing
The anomalous dependence of the lasing parameters of ethanol solutions of coumarin, rhodamine, oxazine, and laser dyes of other classes on the spectrum of microsecond pump laser pulses is found. The dependence is determined by the shape of the induced singlet — singlet absorption spectra and absorption spectra of short-lived photoproducts. The elucidation of the influence of these factors makes it possible to choose optimal pump spectra and to enhance the efficiency and stability of microsecond dye lasers.
S A Batishche, V A Mostovnikov, and V V Tarkovsky
IOP Publishing
Pairs of dyes were selected and the optimal excitation conditions were determined for a two-stage laser in which a dye-solution converter laser was pumped by radiation from a flashlamp-driven microsecond dye laser. The spectral range 495–835 nm was covered by laser pulses with an energy in excess of 1 J, of 1 μs duration, and of 1 mrad divergence. The brightness of the radiation emitted from the converter laser was 140-700 times higher than the brightness of the pump laser radiation.
S A Batishche and V V Tarkovsky
IOP Publishing
A study of the action of single microsecond laser pulses on kidney stones revealed a strong spectral dependence of the efficiency K of mass removal. This should be taken into account in the development of apparatus for laser lithotripsy. An increase in the energy of the laser pulses acting on a stone resulted in saturation of K when a certain energy, specific to each wavelength, was exceeded. The radiation energy should be less than the saturation threshold in order to reduce the effects on the surrounding tissues.
N. M. Artem'ev, S. A. Batishche, A. V. Bortkevich, A. S. Eremenko, B. G. Maglinin, V. A. Mostovnikov, A. I. Stepanov, V. V. Tarkovskii, and A. V. Tolstoshev
Springer Science and Business Media LLC