Method and system for the temporal and spectral characterization of the amplitude and phase of ultrashort laser pulses

A method for the temporal and spectral characterization of the amplitude and phase of ultrashort laser pulses, wherein the method comprises the steps of:

• a pulse manipulation stage, which comprises the steps of:
• creating at least two replicas of an input pulse to be characterized, with a temporal delay between them, having the at least two replicas a relative amplitude;
• varying the relative amplitude of the at least two replicas, between a lower limit and an upper limit, in order to obtain a range of relative amplitudes of the at least two replicas;
• a nonlinear stage, which comprises the steps of:
• applying a nonlinear process to the at least two replicas, obtaining a nonlinear signal for each value of relative amplitudes of the at least two replicas;
• a detection stage, which comprises the steps of:
• measuring and acquiring a spectrum of each nonlinear signal, obtaining a two-dimensional trace;
• a processing and reconstructing stage, which comprises the steps of:
• recovering the temporal and spectral amplitude and phase of the input pulse, applying an algorithm to the two-dimensional nonlinear signal spectra.