Figure 3: Linear versus Nonlinear Spectrum.
From: Capacity estimates for optical transmission based on the nonlinear Fourier transform
(a) The evolution of the nonlinear spectrum of a 100 OFDM subcarriers with the 5 GHZ carrier spacing. (b) The evolution of the same sequence without the NIS module. (c) The evolution of the nonlinear spectrum for Nch=5 WDM channels in the NIS-based transmission. (d) The same but without the NIS block.
