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Stokes space based digital signal processing (DSP) techniques can improve polarization demultiplexing, polarization dependent losses compensation, and other polarization-related tasks in coherent receivers, particularly in terms of convergence speed and transparency to higher-level M-ary modulated signals. This paper reports recent advances on Stokes space based DSP for coherent optical communications...
We experimentally assess the performance versus complexity tradeoff of advanced split-step and Volterra-based digital backpropagation (DBP) techniques, applied to a WDM (75-GHz flexigrid) ultra-long-haul (ULH) transmission system composed of five dual-carrier PM-16 quadratic-amplitude modulation 400 G superchannels. Using the recently proposed weighted Volterra series nonlinear equalizer (W-VSNE),...
A sliding window method to apply the Stokes space based polarization multiplexing technique in a time varying SOP scenario is proposed. The method uses the Stokes space representation of the signal samples SOP in order to dynamically reverse the coupling between the two orthogonal polarizations. We show that the variables of the method, the number of samples used in each best fitting plane process...
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