Acoustic signal for femtosecond filament plasma grating characterization in air

Daniil E. Shipilo; Vladislav V. Pankratov; Nikolay A. Panov; Vladimir A. Makarov; Andrei B. Savel’ev; Olga G. Kosareva

doi:10.1007/978-3-030-05974-3_17

Acoustic signal for femtosecond filament plasma grating characterization in air

Daniil E. Shipilo, Vladislav V. Pankratov, Nikolay A. Panov, Vladimir A. Makarov, Andrei B. Savel’ev, Olga G. Kosareva

Research output: Chapter or section in a book/report/conference proceeding › Chapter or section

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Abstract

We have designed the physical model and numerical algorithm for the simulations of acoustic wave propagation from the source induced by relaxation of a femtosecond plasma grating formed by two crossing filaments in atmospheric air. The model is based on the wave equation with the wave velocity depending on the transverse temperature variation. The algorithm is based on the fine resolution (≈2μm ) numerical grid employed for the description of the plasma channel substructures in the course of femtosecond filamentation. We have shown that the femtosecond plasma grating emits the superposition of two acoustic signals after plasma recombination. One acoustic signal is represented by an isotropic cylindrical waveform with the characteristic spatial scale equal to the filament diameter (100–200 μ m ) while the other has the spatial scale equal to the plasma grating period in the range 20-40μm. This second wave propagates in the direction parallel to the axis of plasma grating modulation. Based on the simulations, we suggested the noninvasive method for the plasma grating period and the beam convergence angle detection.

Original language	English
Title of host publication	Springer Series in Chemical Physics
Publisher	Springer New York
Pages	343-353
Number of pages	11
DOIs	https://doi.org/10.1007/978-3-030-05974-3_17
Publication status	Published - 2019

Publication series

Name	Springer Series in Chemical Physics
Volume	119
ISSN (Print)	0172-6218

Funding

Acknowledgements This work was partially supported by the Russian Foundation for Basic Research (Grant Nos. 18-52-16020, 18-02-00954, 18-32-01000) and the National key research and development program (2018YFB0504400). D.E.S. acknowledges the program “UMNIK” of Foundation of assistance to development of small forms of enterprises in scientific-technical sphere (FASIE) (11522GU/2017), Scholarship of “Basis” Foundation, Scholarship of RF President SP-2453.2018.2, and SPIE 2018 Optics and Photonics Education Scholarship.

ASJC Scopus subject areas

Physical and Theoretical Chemistry

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10.1007/978-3-030-05974-3_17

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Acoustic signal for femtosecond filament plasma grating characterization in air. / Shipilo, Daniil E.; Pankratov, Vladislav V.; Panov, Nikolay A. et al.
Springer Series in Chemical Physics. Springer New York, 2019. p. 343-353 (Springer Series in Chemical Physics; Vol. 119).

Research output: Chapter or section in a book/report/conference proceeding › Chapter or section

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AU - Pankratov, Vladislav V.

AU - Panov, Nikolay A.

AU - Makarov, Vladimir A.

AU - Savel’ev, Andrei B.

AU - Kosareva, Olga G.

PY - 2019

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AB - We have designed the physical model and numerical algorithm for the simulations of acoustic wave propagation from the source induced by relaxation of a femtosecond plasma grating formed by two crossing filaments in atmospheric air. The model is based on the wave equation with the wave velocity depending on the transverse temperature variation. The algorithm is based on the fine resolution (≈2μm ) numerical grid employed for the description of the plasma channel substructures in the course of femtosecond filamentation. We have shown that the femtosecond plasma grating emits the superposition of two acoustic signals after plasma recombination. One acoustic signal is represented by an isotropic cylindrical waveform with the characteristic spatial scale equal to the filament diameter (100–200 μ m ) while the other has the spatial scale equal to the plasma grating period in the range 20-40μm. This second wave propagates in the direction parallel to the axis of plasma grating modulation. Based on the simulations, we suggested the noninvasive method for the plasma grating period and the beam convergence angle detection.

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Acoustic signal for femtosecond filament plasma grating characterization in air

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