Vol. 23, issue 11, article # 9

Apeksimov D. V., Geints Yu. E., Zemlyanov A. A., Kabanov A. M., Matvienko G. G., Oshlakov V. K., Stepanov A. N. Effective parameters of TW femtosecond laser radiation on a horizontal atmospheric path. // Optika Atmosfery i Okeana. 2010. V. 23. No. 11. P. 1006-1013 [in Russian].
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Angular and spectral effective parameters of intense chirped femtosecond laser radiations upon the propagation on open atmospheric path in conditions of self-focusing and filamentation, depending on the initial energy of laser pulse, are experimentally investigated. The regime, when initially highly aberrational laser beam forms a steady spatial configuration of the filaments, which number is defined by the energy of radiation is studied. The results of numerical calculations of non-stationary self-focusing in air of laser beam with a multimodal transversal intensity profile, which qualitatively interpret experimental data, are presented.


ultra-short laser radiation, non-stationary self-focusing, laser filamentation, radiation effective parameters, chirped laser pulse