An advanced receiver model for the optically amplified communication system (based on EDFA, Raman or hybrid Raman/EDF amplifiers) is proposed. It is independent on modulation scheme, pulse shape, type of electrical filter and type of optical filter. The channel is modeled as a stationary additive noise channel with memory (intersymbol interference-ISI), with the noise at its arbitrary statistics. The validity of the model is verified by Monte Carlo simulations for different modulation schemes like non return to zero (NRZ), return to zero (RZ), chirped return to zero (CRZ) and carrier suppressed return to zero (CSRZ) with respect to the amplifier spontaneous emission (ASE) noise. An excellent agreement is obtained for the all considered schemes.
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Djordjević et al. (2004) studied this question.
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