Výsledky vyhledávání - "S I Derzhavin"

Morphology and photoluminescence properties of silicon nanoparticles deposited in helium-nitrogen mixtures maintained at low residual pressures

Autor: A Yu Kharin, Andrei V. Kabashin, S V Antonenko, S. I. Derzhavin, N. I. Kargin, N. V. Karpov, A. A. Garmash, S. M. Klimentov, V. Yu. Timoshenko, A A Fronya

Publikováno v: PhysBio Conference
PhysBio Conference, Oct 2022, Moscow, Russia. pp.012011, ⟨10.1088/1742-6596/2058/1/012011⟩

We elaborated a technique of pulsed laser ablation in gas mixtures (He-N2), maintained under residual pressures of 0.5–5 Torr to deposit silicon (Si)-based nanostructured films on a substrate. We show that the deposited films can exhibit strong pho

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7b2f2de569b8d4101bc30155c5e7d9c
https://hal.science/hal-03873463/document

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Lasing Characteristics of Single-Mode Laser Diode Arrays at Spectral Combining of Beams

Autor: S I Derzhavin, R. V. Grishaev, V. N. Timoshkin, D. N. Mamonov, M. D. Khomenko, V. P. Yakunin

Publikováno v: Physics of Wave Phenomena. 28:208-212

Lasing of an array of 30 single-mode laser diodes with different wavelengths is experimentally investigated in the scheme of spectral beam combining. The maximum lasing power of 7.2 W is obtained in the pulsed mode with the quality of the combined be

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8ea99087427270c5c90953fd5ed5e0a6
https://doi.org/10.3103/s1541308x20030061

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Investigation of the Efficiency of Spectral Beam Combining of Laser Diode Array in a Cavity with the Spectrally Selective Output Coupler

Autor: M. D. Khomenko, D. N. Mamonov, R. V. Grishaev, Ya. V. Kravchenko, S I Derzhavin, V. P. Yakunin

Publikováno v: Journal of Russian Laser Research. 41:434-440

We investigate the operating modes of diode lasers in the external cavity scheme of spectral beam combining, using the virtual laser-diode array method. We determine the spectral range of the diode array and the watt–ampere characteristics of a sin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9c0483f8285b419db03cfd99c93ff494
https://doi.org/10.1007/s10946-020-09896-4

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Optimization of laser cleaning conditions using multimode short-pulse radiation

Autor: Ya. V. Kravchenko, S. M. Klimentov, S I Derzhavin, D. N. Mamonov, N. V. Karpov, A. N. Mayorov

Publikováno v: Optical and Quantum Electronics. 52

Aiming at significant enhancement of laser cleaning efficiency and productivity, we studied several typical experimental cases including removal of contaminated layers from absorbing surfaces, paying special attention to elimination of the thick rust

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9d7db10f7b90147d3356906eed2af8af
https://doi.org/10.1007/s11082-020-02399-1

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Photoluminescent Si-based nanocrystals prepared by pulsed laser ablation in low-pressure helium-nitrogen mixtures for biomedical applications

Autor: V. Yu. Timoshenko, N. V. Karpov, N. I. Kargin, Andrei V. Kabashin, Yaroslava I. Dombrovska, A Yu Kharin, S. M. Klimentov, A A Fronya, A. A. Garmash, S V Antonenko, S. I. Derzhavin

Publikováno v: Synthesis and Photonics of Nanoscale Materials XVII
SPIE LASE
SPIE LASE, Feb 2020, San Francisco, United States. ⟨10.1117/12.2551482⟩

International audience; Nanocrystalline silicon (Si) films were synthesized by nanosecond laser ablation of crystalline Si targets in low-pressure helium (He) and nitrogen (N2) gas mixtures. Photoluminescence (PL) spectra of the prepared samples were

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1cbbfb5e97728ae7ba402b0ea4baba0b
https://hal.archives-ouvertes.fr/hal-03100819/document

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Generation Dynamics of Coupled Pulses from a Single Active Element of the End-Pumped Solid-State Laser: Experiment and Simulation

Autor: Ya. V. Kravchenko, S. M. Klimentov, S I Derzhavin, D. N. Mamonov

Publikováno v: Physics of Wave Phenomena. 26:214-220

Experimental and theoretical study is given to the coupling of pulsed radiation in two adjacent end pump regions of the Nd:YAG solid-state active element in the passively Q-switched Cr:YAG laser. The two-channel laser generates a pair of short pulses

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ce7807bf1fd58e162085fd02b7a406d8
https://doi.org/10.3103/s1541308x18030068

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Semiconductor disk laser in the nanosecond lasing mode

Autor: S I Derzhavin, S. V. Podmazov, G. G. Novikov, S. M. Klimentov

Publikováno v: Physics of Wave Phenomena. 25:276-279

Pulse generation (pulse duration 370 to 34 ns) is obtained for the semiconductor disk laser optically pumped by the Cr:LiCAF laser beam. Dynamics of its lasing spectrum during the pump pulse is investigated. Generation pulse variations under the mism

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0d7895eb8c8e95b92dc05f1bbe5b8edf
https://doi.org/10.3103/s1541308x17040069

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Study of the emission spectra of a 1320-nm semiconductor disk laser and its second harmonic

Autor: S V Podmazov, O N Evdokimova, Igor O. Zolotovskii, S I Derzhavin, K S Gochelashvili

Publikováno v: Quantum Electronics. 46:197-200

The spectral characteristics of an optically pumped external-cavity semiconductor disk laser near λ = 1320 nm are studied experimentally. Intracavity second harmonic generation is obtained using an LBO nonlinear crystal. The output power at a wavele

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6931ef34ecb26061b2a39031b04b7542
https://doi.org/10.1070/qel15952

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High-power short-pulse solid-state microlaser with segmented diode pumping

Autor: V. N. Timoshkin, Ya. V. Kravchenko, N. V. Karpov, D. N. Mamonov, S. M. Klimentov, S. I. Derzhavin

Publikováno v: Journal of Optical Technology. 87:459

In this study, the mechanism of pulse generation is investigated in a compact laser system based on YAG:Nd3+ with passive Q-switching, which utilizes segmented pumping of the active medium by seven quasicontinuous laser diodes with fiber-optic radiat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c3ddea4062ab2cbabd2746be6023c394
https://doi.org/10.1364/jot.87.000459

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