Speaker
Dr
Vladimir Zvorykin
(P.N. Lebedev Physical Institute)
Description
Multiple filamentation of UV picosecond pulses being amplified in hybrid Ti:Sapphire/KrF laser facility GARPUN-MTW was investigated under propagation in atmospheric air over ~100 m. Peak pulse power attained 0.3 TW, which is in 3000 times higher than the critical value (~0.1 GW) for filamentation of 248 nm wavelength radiation. In contrast to 100-fs pulses significant distinctive features (3 times bigger filament diameter, several orders of magnitude lower clamped intensity and electron density, linear whole beam focusing behavior) were observed being probably caused by Resonance Enhanced Multi-Photon Ionization of gas via two-photon resonance excitation of oxygen molecules and stimulated Raman scattering.
Primary author
Dr
Vladimir Zvorykin
(P.N. Lebedev Physical Institute)
Co-authors
Dr
Alexei Levchenko
(P.N. Lebedev Physical Institute)
Mr
Alexei Shutov
(P.N. Lebedev Physical Institute)
Prof.
Andrei Ionin
(P.N. Lebedev Physical Institute)
Dr
Dmitrii Sinitsyn
(P.N. Lebedev Physical Institute)
Dr
Igor' Smetanin
(P.N. Lebedev Physical Institute)
Dr
Leonid Seleznev
(P.N. Lebedev Physical Institute)
Dr
Nikolai Ustinovskii
(P.N. Lebedev Physical Institute)
