Abstract
We present the application of time-resolved off-axis digital holography for the investigation of refractive index/transmission properties of laser-induced plasma filaments in water. Time evolution of both amplitude- and phase-contrast images of the self-focused beam in water was characterized with temporal resolution better than 50 fs. To the best of our knowledge, this is the first attempt to characterize the propagation of femtosecond laser pulse in nonlinear media using off-axis digital holography.
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