Generation of broadband similaritons for complete characterization of femtosecond pulses

► Broadband similariton of 50 THz bandwidth is generated in passive uniform fiber. ► The broadband similariton is characterized by means of its chirp measurement. ► Only dispersion determines the phase of broadband nonlinear-dispersive similariton. ► Two similariton-based methods for femtosecond-scale measurements are demonstrated. ► Our comparative study evidences the high precision of both methods.