We report experimental evidence of self-guided propagation of femtosecond laser pulses in water. A light filament induced by 170-fs, 527-nm pulses has a diameter of 60µm (at the 1/<i>e</i><sup>2</sup> level) and persists over a distance of 20 mm. The filamentary mode is sustained over a wide range of input power, and the energy excess is converted into conical emission. In the time domain, the pulse trapped in a filamentary mode experiences a number of splittings occurring in the early stage of filament formation.
© 2003 Optical Society of America
A. Dubietis, G. Tamošauskas, I. Diomin, and A. Varanavičius, "Self-guided propagation of femtosecond light pulses in water," Opt. Lett. 28, 1269-1271 (2003)