W. Forysiak et al., AVERAGE SOLITON PROPAGATION IN PERIODICALLY AMPLIFIED SYSTEMS WITH STEPWISE DISPERSION-PROFILED FIBER, Optics letters, 19(3), 1994, pp. 174-176
Average soliton propagation in periodically amplified soliton systems
with stepwise varying fiber dispersion is studied. Optimal dispersion
profiles are obtained by minimization of a simple and intuitively appe
aling perturbation function. At a given data rate, n-fold profiling is
shown to permit n-fold extension of amplifier spacing. Equivalently,
at a given amplifier spacing, it permits square-root n-fold increase o
f data rate. Hence, we demonstrate the feasibility of 40-Gbit/s operat
ion over several hundred kilometers, using 5-ps solitons and 50-km amp
lifier spans.