Fig. 2: Split-step simulation with various spectro-temporal division of lightwaves.
From: Shaping lightwaves in time and frequency for optical fiber communication
a Effective SNR drawn as a function of the symbol rate (spectral division) and shaping block duration (temporal division). b NGMI showing the end-to-end performance, produced by the complex interaction of the propagation effect and the fundamental energy efficiency of the underlying sphere shaping. c NLI coefficient \(\eta\) and its decompositions into SPM contribution \({\eta }_{{SPM}}\) and XPM contribution \({\eta }_{{XPM}}\), and into factors due to i.i.d. shaping \({\eta }^{\infty }\) and finite-length shaping \(\Delta \eta\). Source data for Fig. 2 are provided with this paper.
