We show that the filamentation dynamics of a femtosecond laser probe pulse can be readily controlled by properly matching
it to the quantum revivals of pre-aligned molecules prepared through impulsive rotational Raman excitation with an advancing
ultrashort pump pulse. Several features of the filamentation process including supercontinuum generation, the length of the
plasma channel generated in the wake of the filament, the associated secondary radiations and the multiple filamentation pattern
are all easily modified by tuning the cross phase modulation induced by the field-free revivals of molecular alignment, through
the delay between the pump and the probe pulses. We show that molecular alignment can also be used to generate conical waves
with extremely short intensity spike called shocked X-waves and to further tune the frequency of a few-cycle laser pulse in
the wake of a self-guided intense filament.
PACS numbers 42.65.Jx - 52.38.Hb - 37.10.Vz - 33.80.-b
Original Russian Text © Astro, Ltd., 2009.
The article is published in the original.