Vol. 14, issue 05, article # 1

pdf Golubtsov I. S., Kandidov V. P., Kosareva O. G. Conical emission of high-power femtosecond laser pulse in the atmosphere. // Atmospheric and oceanic optics. 2001. V. 14. No. 05. P. 303-315.
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The most complete (among the earlier considered) model of nonstationary nonlinear optical interaction of high-power femtosecond pulsed laser radiation with air medium is proposed. Taking into account the delay of the Kerr response of the medium, contribution of the material dispersion in the third-order approximation, and application of the Perelomov-Popov-Terent'ev model of photoionization adequate to the experimental data allowed us to obtain results, which well agree quantitatively with the experiment. It is shown that the conical emission of supercontinuum results from the pulse self-phase modulation in space and time under the conditions of strong optical nonlinearity of a highly localized light field.