COMPRESSION OF OPTICAL SOLITONS BY CONVERSION OF NONLINEAR MODES

One can transform an optical pulse containing higher-order soliton mod es and/or radiation modes into a compressed almost ideal single-solito n pulse by passing it through an initial adaptive fiber of suitably ch osen length and dispersion. Analytical approximations, in good agreeme nt with numerical simulations, are found for the optimal values of the length and the dispersion of the adaptive fiber. The technique is app lied to the case of nonadiabatically amplified soliton pulses, for whi ch the transformation is shown to result in efficiently compressed sol iton pulses.