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Proceedings Paper

Spatial and spectral characteristics of the distribution post-filamentation zone of femtosecond laser pulses
Author(s): D. V. Apeksimov; A. A. Zemlyanov; A. N. Iglakova; A. M. Kabanov; O. I. Kuchinskaya; G. G. Matvienko; V. K. Oshlakov; A. V. Petrov
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Paper Abstract

The transverse structure formation processes of a laser beam after multiple filamentation were investigated. It is shown that the spectra of post-filamentation light channels (PFC), rings and beam differ substantially. The spectrum of PFC has a significant and symmetrical spectral broadening and covers a range of 600-1100 nm. The broadening of the spectrum of the rings is asymmetric and is directed mainly to the short-wavelength region of the spectrum. The broadening data are stable and do not change when moving away from the multiple filamentation zone. The annular structure of radiation in the cross section of the beam is formed around individual filaments within the region of multiple filamentation, and at a distance of tens of meters from it begins to form a common ring structure surrounding postfilamentation channels.

Paper Details

Date Published: 30 November 2017
PDF: 4 pages
Proc. SPIE 10466, 23rd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 104661A (30 November 2017); doi: 10.1117/12.2286020
Show Author Affiliations
D. V. Apeksimov, V.E. Zuev Institute of Atmospheric Optics (Russian Federation)
A. A. Zemlyanov, V.E. Zuev Institute of Atmospheric Optics (Russian Federation)
A. N. Iglakova, V.E. Zuev Institute of Atmospheric Optics (Russian Federation)
A. M. Kabanov, V.E. Zuev Institute of Atmospheric Optics (Russian Federation)
O. I. Kuchinskaya, V.E. Zuev Institute of Atmospheric Optics (Russian Federation)
National Research Tomsk State Univ. (Russian Federation)
G. G. Matvienko, V.E. Zuev Institute of Atmospheric Optics (Russian Federation)
National Research Tomsk State Univ. (Russian Federation)
V. K. Oshlakov, V.E. Zuev Institute of Atmospheric Optics (Russian Federation)
A. V. Petrov, V.E. Zuev Institute of Atmospheric Optics (Russian Federation)


Published in SPIE Proceedings Vol. 10466:
23rd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics
Gennadii G. Matvienko; Oleg A. Romanovskii, Editor(s)

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