The new model predicts modulation formats with inter-channel stimulated Raman scattering, suggesting improved accuracy.
The four-dimensional nonlinear model is extended to include the inter-channel stimulated Raman scattering, enabling accurate prediction of dual-polarization four-dimensional modulation formats and probabilistically shaped constellations in high-dispersion regimes. The proposed model is validated via comparisons with the split-step Fourier method and enhanced Gaussian noise model.
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Liang et al. (2025) studied this question.
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