We have monitored the space–time transformation of a 150-fs pulse undergoing self-focusing and filamentation in water, by means of the nonlinear gating technique. We have observed that pulse splitting and subsequent recombination apply to axial temporal intensity only, whereas the space-integrated pulse profile preserves its original shape.
© 2004 Optical Society of America
(190.5530) Nonlinear optics : Pulse propagation and temporal solitons
(190.5940) Nonlinear optics : Self-action effects
(260.5950) Physical optics : Self-focusing
(320.7100) Ultrafast optics : Ultrafast measurements
A. Matijošius, *J. Trull, P. Di Trapani, A. Dubietis, R. Piskarskas, A. Varanavičius, and A. Piskarskas, "Nonlinear space-time dynamics of ultrashort wave packets in water," Opt. Lett. 29, 1123-1125 (2004)