We investigate by numerical simulation the effects of the initial parameter fluctuations of optical pulses and the intervals of pulse pairs on the evolution of mildly dispersion-managed soliton transmissions and find that dispersion-managed soliton pairs are always on the walk-off in relation to the initial state

and the walk-off extent is relative to the initial interval between the soliton pairs.Furthermore

the evolution of dispersion-managed optical solitons is more sensitive to the initial pulse width fluctuation than to other initial parameters

so the initial pulse width should be first determined before such systems are designed.