Exploring the Femtosecond Filamentation Threshold in Liquid Media Using a Mach-Zehnder Interferometer.

We experimentally studied the supercontinuum induced by femtosecond filamentation in different liquid media. Using a Mach-Zehnder interferometer, we determined the relative filamentation thresholds () of these media. Research has shown that the value of the filamentation threshold is greater than that of (critical power for self-focusing), which can mainly be attributed to the strong dispersion effect.