QUASI-STABLE SOLITON TRANSMISSION IN DISPERSION MANAGED FIBER LINKS WITH LUMPED AMPLIFIERS

We study quasi-stable solitons in a cascaded fiber line with alternati ng positive and negative dispersions, with and without fiber loss, Alt hough more energy is required for forming the quasi stable solitons th an the regular solitons in a uniform fiber system with the same averag e dispersion, the required soliton energy decreases as the energy loss in one amplification period increases, eventually approaching the sam e value as in a uniform fiber system, Thus, the predicted advantage of higher soliton energy in dispersion-managed system is diminished in t he presence of loss.