Mismatched Models to Lower Bound the Capacity of Dual-Polarization Optical Fiber Channels

Regular perturbation is applied to the Manakov equation and motivates a generalized correlated phase-and-additive noise model for wavelength-division multiplexing over dual-polarization optical fiber channels. The includes three hidden Gauss-Markov processes: phase noise, polarization rotation, additive noise. Particle filtering used compute lower bounds on capacity of multi-carrier communication with frequency-dependent powers delays. A gain 0.17 bits/s/Hz/pol in spectral efficiency or 0.8 dB power achieved respect existing models at their peak data rate. Frequency-dependent delays also increase single-polarization