Influences of polarization-mode dispersion on soliton transmissionsystems

摘要

In soliton transmission systems with polarization-mode dispersionn(PMD), random birefringence causes solitons to generate dispersivenwaves, which degrade soliton transmission systems in two aspects. First,nthe dispersive waves cause solitons to continuously lose energy, thusninduce pulse broadening. Second, the dispersive waves interact withnother soliton pulses and cause distortion of a sequence of solitonnpulses. Both of these effects induce performance degradation of solitonntransmission systems. We study these effects of PMD on both conventionalnand dispersion-managed (DM) soliton transmission systems. We show that,nfor conventional soliton systems, although single pulse has robustnessnto PMD, the interplay between the dispersive waves and solitons wouldnseriously distort a sequence of pulses and make soliton systems worsenthan linear systems if all other transmission impairments are neglected.nWe also show that DM solitons are more robust to PMD than bothnconventional solitons and linear systems due to the enhancednnonlinearity and less sensitivity of DM solitons to perturbations. Wenfurther point out that soliton collision-induced polarization scatteringncauses additional timing jitter and system performance penalty in WDMnsoliton systems