Dr. Sergei Tochitsky Profile

Dr. Sergei Tochitsky

at Univ of California Los Angeles

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Publications (7)

Proceedings Article | 13 March 2024 Presentation

Room temperature, 55 mJ/pulse, gain-switched Fe:ZnSe laser system pumped by radiation of electro-optically Q-switched Cr:Er:YSGG MOPA

D. Martyshkin, V. Fedorov, S. Hamlin, S. Tochitsky, S. Mirov

Proceedings Volume PC12864, PC1286403 (2024) https://doi.org/10.1117/12.3003481

KEYWORDS: Laser radiation, Electro optics, Q switching, Q switched lasers, Beam divergence, Oscillators, Laser systems engineering, Carbon dioxide lasers, Tunable lasers, Solid state physics

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Proceedings Article | 7 June 2017 Presentation

Nonlinear guiding of picosecond CO2 laser pulses in atmosphere (Conference Presentation)

Sergei Tochitsky

Proceedings Volume 10193, 101930L (2017) https://doi.org/10.1117/12.2261892

KEYWORDS: Carbon dioxide lasers, Picosecond phenomena, Atmospheric propagation, Diffraction, Plasma, Ultrafast phenomena, Photonics, Current controlled current source

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Proceedings Article | 1 March 2001 Paper

Efficient intracavity frequency doubling of CO2 laser in nonlinear crystals

Vladimir Petukhov, Vadim Gorobets, Sergei Tochitsky, Konstantin Kozlov

Proceedings Volume 4351, (2001) https://doi.org/10.1117/12.417705

KEYWORDS: Second-harmonic generation, Carbon dioxide lasers, Nonlinear crystals, Crystals, Silver selenogallate, Continuous wave operation, Laser crystals, Output couplers, Energy efficiency, Absorption

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Proceedings Article | 27 November 2000 Paper

Effective frequency conversion in nonlinear crystals for lasers of middle-infrared range

Vladimir Petukhov, Vadim Gorobets, Sergei Tochitsky, Vladimir Jakimovich, Valirii Konstantinov

Proceedings Volume 4316, (2000) https://doi.org/10.1117/12.407682

KEYWORDS: Crystals, Silver selenogallate, Nonlinear crystals, Carbon dioxide lasers, Laser crystals, Annealing, Plasma, Laser damage threshold, Second-harmonic generation, Absorption

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Proceedings Article | 22 April 1996 Paper

CO2 laser with frequency doubling in the nonlinear output mirror

Vadim Gorobets, Vladimir Petukhov, Sergei Tochitsky, V. Churakov, A. Fomin, Vladimir Jakimovich

Proceedings Volume 2773, (1996) https://doi.org/10.1117/12.238530

KEYWORDS: Carbon dioxide lasers, Second-harmonic generation, Mirrors, Energy efficiency, Crystals, Nonlinear crystals, Output couplers, Silver selenogallate, Harmonic generation, Fabry–Perot interferometers

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Proceedings Article | 2 January 1995 Paper

Stabilized cw CO2(CO) laser with automatic tuning over oscillation lines for monitoring of air pollutants

Vadim Gorobets, Vladimir Petukhov, Sergei Tochitsky, V. Churakov

Proceedings Volume 2370, (1995) https://doi.org/10.1117/12.197403

KEYWORDS: Carbon dioxide lasers, Gas lasers, Carbon monoxide, Crystals, Carbon dioxide, Laser crystals, Molecules, Silver selenogallate, Laser stabilization, Diffraction gratings

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Proceedings Article | 2 January 1995 Paper

TEA CO2 laser tunable over the lines of regular and nontraditional bands designed for lidar systems

Vadim Gorobets, Vladimir Petukhov, Sergei Tochitsky, V. Churakov

Proceedings Volume 2370, (1995) https://doi.org/10.1117/12.197402

KEYWORDS: Carbon dioxide lasers, Absorption, Carbon dioxide, Atmospheric monitoring, Resonators, LIDAR, Atmospheric sciences, Environmental monitoring, Laser applications, Life sciences

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The present-day ecological situation calls for lidar systems based on CO₂ lasers. However, the spectral tuning range of a conventional CO₂ laser is limited by a discrete set of oscillation lines on the regular bands 00⁰1 - 10⁰0, 00⁰1 - 02⁰0. Therefore, the possibility of using such lasers for atmospheric monitoring is limited and depends on accidental coincidence of radiation frequencies and absorption resonances of chemical compounds polluting the atmosphere. Besides, the presence of carbon dioxide in the environment leads to significant losses due to the absorption at its transmission in the atmosphere for considerable distances. We and other investigators obtained powerful radiation pulses at a sufficiently high efficiency in a TEA CO₂ laser on nontraditional bands: the sequence (00⁰2 - 10⁰1, 00⁰2 - 02⁰1) and the hot (01¹1-11¹0) bands, which more than doubles the radiation spectrum of conventional CO₂ lasers thus widening their potentialities for atmospheric monitoring. It is also important that the radiation of nontraditional bands practically is not absorbed by atmospheric carbon dioxide. In this paper, we present a UV-preionization TEA CO₂ laser tunable over the lines of regular and nontraditional bands specially designed for atmospheric monitoring. Developing it, we took into account the fact that atmospheric monitoring places certain demands on lasers: high stability of output performances, a comparatively narrow oscillation line, low beam divergence, possibility of working in pulse-periodic regime. Besides, the laser has high energy performances and the widest possible spectral range of tuning. Special consideration was given to the real problem of tunable CO₂ lasers -- automatization of the process of tuning over oscillation lines. On the basis of this laser a lidar system was created which has passed an in- the-field test to satisfaction. With its use small concentrations (at a tolerable-concentration level) of a number of gaseous pollutants was determined.

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