By means of a time-resolved, shadowgraphic method we observed directly the development of the pulse-splitting dynamics of a femtosecond laser pulse propagating in the filamentary regime in water. For the first time to our knowledge, the relative splitting velocity was measured. We compare the experimental data with numerical simulations. A possible scenario for the splitting event and evolution of the fragments is discussed.
© 2009 Optical Society of America
Original Manuscript: June 26, 2009
Revised Manuscript: August 31, 2009
Manuscript Accepted: September 1, 2009
Published: September 30, 2009
Stefano Minardi, Amrutha Gopal, Arnaud Couairon, Gintaras Tamoašuskas, Rimtautas Piskarskas, Audrius Dubietis, and Paolo Di Trapani, "Accurate retrieval of pulse-splitting dynamics of a femtosecond filament in water by time-resolved shadowgraphy," Opt. Lett. 34, 3020-3022 (2009)