Abstract

Distributed Raman amplification is an attractive way to improve the OSNR in optical transmission systems. However, this requires profound system knowledge to profit from these potential benefits. Especially in the case of co-directional pumped Raman amplifiers the evolution of the signal powers over the propagation distance is of interest in order to avoid signal distortions. Within the design process of co-directionally pumped transmission lines numerical simulations can assist to achieve optimized OSNR. Within the modelling of Raman amplification signals are often considered as continues waves to calculate the power evolution of the signals and pumps. However, this is only an approximation as the power of the transmitted signals varies over time. We present a novel approach to capture the bit-pattern dependence of Raman scattering.

© 2017 IEEE