Interchannel collisions of strong dispersion-managed solitons with different energies in the presence of higher-order effects

We study the interaction properties of two-channel wavelength-division multiplexed strongly dispersion managed communication systems. By means of a variational approach to the Generalized Nonlinear Schrödinger Equation we obtain an ordinary differential equations model for the main parameters of the pulses including third-order dispersion, Raman scattering and self-steepening. We study the residual frequency shift for each channel after the collision between sets of two pulses as a function of the ratio of dissimilar peak powers in a broad range of dispersion difference values, concluding that the transmission characteristics improve by using specific values of unequal energies and considering higher-order correction terms.