The nonlinear fiber-optic channel: Modeling and achievable information rate

The problem of evaluating the channel capacity of a nonlinear fiber-optic system is reviewed. After properly defining the nonlinear fiber-optic channel, we consider a few alternative models and discuss their suitability for system design and performance evaluation. It is shown that using an accurate model can allow devising modulation and detection schemes providing higher robustness to nonlinear effects than those obtainable by simpler models