Abstract
We provide a theoretical model that can accurately describe the evolution of stimulated Raman scattering crosstalk in high-speed massive wavelength-division-multiplexed (WDM) systems. Our model takes into account channel walk-off effects due to group-velocity dispersion and directly involves the bit-1 probability and the duty cycle of the modulation sequence. Our analytical predictions are found to be in excellent agreement with numerical simulations carried out using pseudo-random bit patterns in a return-to-zero format. These results are also applicable even in the case of amplified WDM systems. Pertinent examples are provided.
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