Investigations of the dispersion tolerance of the nonlinear optical transmission channel for different modulation formats in a WDM-system

We investigate the dispersion tolerance for nonlinear WDM transmission of the modulation formats ASK, DPSK, DQPSK and duobinary with NRZ as well as RZ pulse shape. We study different dispersion maps and determine for each modulation format an optimized dispersion map to examine the robustness against variations of the dispersion map and against nonlinear effects.