Experimental evidence of pseudoperiodical soliton propagation in dispersion-managed links

A new technique for measuring chirp evolution of Gaussian-like pulses trans mitted on single-mode fiber is presented, It is used in a recirculation loo p experiment to characterize propagation in anomalous-dispersion regime ove r megametrical distances. In-quadrature periodical variations of the two ch aracteristic parameters of pulses (i.e., spectral width and chirp) are meas ured versus distance for different values of prechirp and in-line power, Th is constitutes the first experimental evidence of pseudoperiodical soliton propagation in dispersion-managed links. It also demonstrates that the prec hirp is a key element for the control of nonlinearity as predicted bg the t heory.