V.P. Kandidov

TL;DR: In this paper, the authors investigated the long light filaments generated in air by powerful ultrashort laser pulses, previously attributed to self-channeling, using a Ti:sapphire chirped-pulse-amplification laser system.

TL;DR: The state of the art of investigations on filamentation of a high-power femtosecond laser radiation in transparent media is reviewed in this article, where the physical picture of this phenomenon is presented and its relation to the fundamental concepts of nonlinear optics and practical applications is demonstrated.

TL;DR: In this article, it was shown that the high spatio-temporal localization of the light field in the filament, which enables the supercontinuum generation, is sustained due to the dynamic transformation of light field on the whole transverse scale of the beam, including its edges.

TL;DR: It was found that the conical emission accompanying the filamentation of powerful ultrashort laser pulses in air originates from self-phase modulation in the plasma produced by the pulse during propagation.

TL;DR: In this paper, the competition between femtosecond laser pulse induced optical breakdown and filamentation in condensed matter is studied both experimentally and numerically using water as an example, and the coexistence of filamentation and breakdown is observed under tight focusing conditions.