Marked increase in the power margin through the use of a dispersion-allocated soliton

It is shown for the first time that a dispersion-allocated soliton has a much larger power margin than an ordinary soliton with a uniform dispersion. When a soliton transmission line is dispersion-allocated, it is difficult for a high intensity pulse to evolve into a high-order soliton because of the phase mismatching. Thus, the high intensity soliton retains its waveform with its rather simple profile, and it is confirmed that even N = 2 - 3 soliton power is applicable for communication use which means a power margin increase of 6-9.5 dB front the N = 1 average soliton.