Wideband Multichannel Nyquist-Spaced Long-Haul Optical Transmission Influenced by Enhanced Equalization Phase Noise

Enhanced equalization phase noise (EEPN), generated from the uncompensated dispersion experienced by laser phase noises, can cause serious damage to the transmission quality of optical fiber systems. In this work, the performance of a wideband Nyquist-spaced long-haul nonlinear optical fiber communication systems suffering from EEPN is investigated and discussed through split-step numerical simulations and analytical models based on the perturbation analysis, in the cases of digital nonlinearity compensation (NLC) and electronic dispersion compensation (EDC). The efficiency and the accuracy of the analytical models were validated via simulations, considering the different symbol rates and modulation formats. The performance of the C-band transmission was comprehensively studied based on the model. Our results reveal that the growth of symbol rates and transmission distances aggravates the distortions in the C-band system.

Automated summary

In this work, the performance of wideband Nyquist-spaced long-haul nonlinear optical fiber communication systems suffering from enhanced equalization phase noise (EEPN) is investigated and discussed. The efficiency and accuracy of analytical models are validated through simulations considering different symbol rates and modulation formats. The results reveal that the distortions in the C-band system are aggravated with the increase of symbol rates and transmission distances.