Reduction and suppression of soliton interactions by bandpass filters

We compare a perturbative analysis with a numerical analysis of the reduction of soliton interactions in a long-distance soliton transmission system with lumped amplifiers and filters. We find that soliton interactions may be suppressed by sliding the center frequency of the filters along the line, as devised by Mollenauer et al. [Opt. Lett. 17, 1575 (1992)].