Prof. Valentin A. Orlovich Profile

Prof. Valentin A. Orlovich

at BI Stepanov Institute of Physics

SPIE Involvement:

Author

Publications (19)

Proceedings Article | 22 April 2009 Paper

Frequency shifting of high power laser radiation by stimulated Raman scattering in crystals

H. Rhee, V. Lisinetskii, V. Orlovich, A. Kaminskii, H. Eichler

Proceedings Volume 7131, 71310Z (2009) https://doi.org/10.1117/12.816829

KEYWORDS: Raman spectroscopy, Crystals, Barium, Quantum efficiency, Raman scattering, Laser crystals, Pulsed laser operation, Amplifiers, Mirrors, High power lasers

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Proceedings Article | 23 August 2007 Paper

Q-switched microchip-lasers with intracavity Raman conversion

Sergei Voitikov, Aleksander Demidovich, Aleksander Grabtchikov, Vladimir Burakevich, Viktor Lisinetskii, Miltcho Danailov, Valentin Orlovich

Proceedings Volume 6731, 67312L (2007) https://doi.org/10.1117/12.752926

KEYWORDS: Raman spectroscopy, Crystals, Chemical species, Neodymium, Picosecond phenomena, Pulsed laser operation, Laser crystals, Absorption, Q switching, Q switched lasers

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Proceedings Article | 9 August 2007 Paper

Multi-wavelength quasi-continuous wave all-solid-state system based on Raman lasers

Alexander Vodchits, Dmitry Busko, Valentin Orlovich, Viktor Lisinetskii, Alexander Grabtchikov, Pavel Apanasevich, Hans Eichler

Proceedings Volume 6731, 67310V (2007) https://doi.org/10.1117/12.752639

KEYWORDS: Raman spectroscopy, Crystals, Laser crystals, Nonlinear crystals, Barium, Laser resonators, Axicons, Laser development, Ultraviolet radiation, Refraction

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Proceedings Article | 16 February 2005 Paper

Quasi-cw solid-state system generating a set of lines of laser radiation in the range of 280--740 nm for spectroscopic applications

A. Vodchits, R. Chulkov, D. Busko, V. Lisinetskii, A. Grabtchikov, V. Orlovich

Proceedings Volume 5447, 54470A (2005) https://doi.org/10.1117/12.610479

KEYWORDS: Laser applications, Spectroscopy, Raman spectroscopy, Solid state lasers, Solid state physics, Laser systems engineering, Barium, Nd:YAG lasers, Laser development, Resonators

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Proceedings Article | 16 February 2005 Paper

Intracavity stimulated Raman scattering in Nd:LSB-Cr:YAG microchip lasers

L. Batay, S. Voitikov, A. Grabtchikov, M. Danailov, A. Demidovich, A. Kuzmin, V. Lisinetskii, V. Orlovich

Proceedings Volume 5447, 54470B (2005) https://doi.org/10.1117/12.610483

KEYWORDS: Raman scattering, Laser scattering, Modes of laser operation, Raman spectroscopy, Q switched lasers, Q switching, Crystals, Laser crystals, Thermal modeling, Q switch crystals

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Proceedings Article | 6 October 2003 Paper

Barium-nitrate-based Raman lasers excited with LiF:F2-laser and its second harmonic

Alexander Vodchits, I. Mishkel, Valentin Orlovich, Wolfgang Kiefer, Pavel Apanasevich

Proceedings Volume 5137, (2003) https://doi.org/10.1117/12.517924

KEYWORDS: Raman spectroscopy, Laser induced fluorescence, Mirrors, Crystals, Laser crystals, Barium, Tunable lasers, Laser scattering, Color centers, Energy efficiency

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Proceedings Article | 24 July 2002 Paper

Thermal lensing in barium nitrate due to stimulated Raman scattering of nanosecond laser pulses

Alexander Vodchits, Valery Kozich, Pavel Apanasevich, Valentin Orlovich

Proceedings Volume 4751, (2002) https://doi.org/10.1117/12.475933

KEYWORDS: Crystals, Barium, Nonlinear crystals, Laser crystals, Raman spectroscopy, Raman scattering, Laser scattering, Refractive index, Continuous wave operation, Gases

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Proceedings Article | 24 July 2002 Paper

Modal theory and output patterns of Stokes radiation in SRS: generation at pump with Bessel light beams

Vladimir Belyi, Nikolay Khilo, Valentin Orlovich, A. Grabtchikov, R. Chulkov, V. Lisinetskii

Proceedings Volume 4751, (2002) https://doi.org/10.1117/12.475937

KEYWORDS: Bessel beams, Superposition, Diffraction, Raman spectroscopy, Gaussian beams, Hydrogen, Telescopes, Axicons, Waveguides, Spatial frequencies

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Proceedings Article | 24 July 2002 Paper

Raman amplification in barium nitrate studied with focused laser beams

Alexander Vodchits, Valery Kozich, Dmitrij Ivanov, Valentin Orlovich

Proceedings Volume 4751, (2002) https://doi.org/10.1117/12.475897

KEYWORDS: Photodiodes, Mirrors, Ultraviolet radiation, Crystallography, Nonlinear crystals, Raman scattering, Laser crystals, Crystals, Barium, Raman spectroscopy

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Proceedings Article | 12 March 2001 Paper

Stimulated Raman scattering in compressed gases by short laser pulses

Alexander Vodchits, Wolfgang Werncke, S. Hogiu, Valentin Orlovich

Proceedings Volume 4352, (2001) https://doi.org/10.1117/12.418810

KEYWORDS: Raman spectroscopy, Methane, Hydrogen, Picosecond phenomena, Gases, Prisms, Raman scattering, Femtosecond phenomena, Laser scattering, Dye lasers

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Proceedings Article | 6 November 1998 Paper

Peculiarities of the optical parametric generation in KTP crystal during Nd:YAG laser pumping

V. Belyi, O. Artemenko, Valentin Orlovich, Bronislav Sevruk

Proceedings Volume 3580, (1998) https://doi.org/10.1117/12.330457

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Proceedings Article | 20 May 1996 Paper

Experimental studies of the statistical properties of radiation flows involved in superbroad-band stimulated Raman scattering

A. Vodchitz, Valery Kozich, Pavel Apanasevich, Valentin Orlovich

Proceedings Volume 2800, (1996) https://doi.org/10.1117/12.240529

KEYWORDS: Picosecond phenomena, Femtosecond phenomena, Raman scattering, Laser scattering, Mirrors, Hydrogen, Correlation function, Energy conversion efficiency, Scattering, Light scattering

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Proceedings Article | 6 May 1996 Paper

Effect of quantum noise statistics of spontaneous scattering on the backward SRS process

R. Zaporozhchenko, Valentin Zaporozhchenko, Sergei Kilin, Dmitry Gakhovich, Valentin Orlovich

Proceedings Volume 2799, (1996) https://doi.org/10.1117/12.239842

KEYWORDS: Scattering, Laser scattering, Quantum efficiency, Raman scattering, Neodymium, Hydrogen, Statistical analysis, Polarization, Remote sensing, Light scattering

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Proceedings Article | 11 April 1996 Paper

Highly efficient source of eye-safe radiation based on KTP optical parametric oscillator

Dmitry Gakhovich, A. Grabchikov, Valentin Orlovich, V. Pesotskij, Bronislav Sevruk, Yu. Kamach, Lew Shapiro, Sergey Dvornikov, Vitaly Tugbayev

Proceedings Volume 2772, (1996) https://doi.org/10.1117/12.238081

KEYWORDS: Crystals, Ferroelectric materials, Optical parametric oscillators, Mirrors, Energy efficiency, Signal processing, Reflectivity, Nd:YAG lasers, Nonlinear crystals, Reflection

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Proceedings Article | 2 January 1995 Paper

Investigation of stability and efficiency of SRS-based sources of radiation for spectroscopy applications

Pavel Apanasevich, Dmitry Gakhovich, A. Grabchikov, Valentin Orlovich, V. Pesotskij

Proceedings Volume 2370, (1995) https://doi.org/10.1117/12.197494

KEYWORDS: Solitons, Raman spectroscopy, Spectroscopy, Laser scattering, Energy efficiency, Scattering, Raman scattering, Quantum efficiency, Hydrogen, Laser applications

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Proceedings Article | 2 January 1995 Paper

Time-resolved cross-correlation spectroscopy with incoherent light for studying inter- and intramolecular processes

Pavel Apanasevich, Valery Kozich, Valentin Orlovich, A. Vodchitz

Proceedings Volume 2370, (1995) https://doi.org/10.1117/12.197453

KEYWORDS: Spectroscopy, Femtosecond phenomena, Picosecond phenomena, Liquids, Time resolved spectroscopy, Molecules, Nonlinear response, Life sciences, Laser applications, Solids

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Proceedings Article | 2 January 1995 Paper

Saturation Raman spectroscopy of the excited states of metalloporphyrins

Sergei Kruglik, Pavel Apanasevich, Vladimir Kvach, Valentin Orlovich

Proceedings Volume 2370, (1995) https://doi.org/10.1117/12.197442

KEYWORDS: Raman spectroscopy, Picosecond phenomena, Molecules, Absorption, Life sciences, Spectroscopy, Scattering, Laser applications, Raman scattering, Systems modeling

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Proceedings Article | 1 May 1991 Paper

Intramolecular processes of excitation energy redistribution in metalloporphyrins: examination by transient absorption and resonance Raman and coherent anti-Stokes Raman scattering spectroscopies

Pavel Apanasevich, V. Chyrvony, Sergei Kruglik, Vladimir Kvach, Valentin Orlovich

Proceedings Volume 1403, (1991) https://doi.org/10.1117/12.57388

KEYWORDS: Raman spectroscopy, Absorption, Spectroscopy, Picosecond phenomena, Copper, Ions, Thermography, Absorption spectroscopy, Molecules, CARS tomography

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Proceedings Article | 1 May 1991 Paper

Inter- and intramolecular processes in metalloporphyrins: study by transient absorption and resonance Raman and coherent anti-Stokes Raman scattering

Pavel Apanasevich, Vladimir Chirvony, Sergei Kruglik, Vladimir Kvach, Valentin Orlovich

Proceedings Volume 1403, (1991) https://doi.org/10.1117/12.57272

KEYWORDS: Absorption, Raman spectroscopy, Molecules, Laser applications, Picosecond phenomena, Spectroscopy, Metals, Scattering, Laser scattering, Raman scattering

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The steady interest in metalloporphyrins (Me-P) which have a central metal with an unfilled d-electronic shell is due to the rich variety of photoinduced physico-chemical processes they participate in, and by the possibility of modelling on the basis of them, the behavior of related native biological complexes. Me-Ps with an unfilled d-shell of the central atom have typical two-band absorption spectra in the ground electronic state: intense Soret or B band in the near UV and less intense Q band in the visible. According to Gouterman's fourorbital model,' the Me-P absorption spectrum arises from the promotion of ir-electrons from the highest occupied molecular orbitals a, , a2 to the lowest unoccupied orbitals e of the porphyrin conjugated macrocycle. The a, and a2 orbitals are quasi-degenerate and the electron excited configurations e have the same symmetry. That is why there is a strong mixing between the two orbital excitations a, -e and a, - e due to the configurational interaction via the electron-electron repulsion, resulting in a two-band absorption spectrum. The effect of the central atom is interpreted in this model as a perturbation of the ir-states of the porphyrin ring. The perturbation is largely determined by the electrons of the unfilled shells of the metal ion (e.g. the md'-shell). This effect is quite pronounced for the ground electronic state, nevertheless the interactions of excited ir-electronic configurations with d-electron ones cause more dramatic changes in the spectroscopic properties of Me-P excited states. New low-lying excited states are possible: the charge-transfer (CT) levels related to the electrodensity transfering from the ring a, , a2 to the d-orbitals of central metal (ir-d states) or from the d-orbitals to the ring e(d - ir states), and (d - d) levels bound up with the d-electron excitations. The present paper deals with the investigations of porphyrin metallocomplexes with nickel (Ni-P) and copper (Cu-P) having electron configurations 3d8 and 3d9 , respectively.