Spectral Broadening of Gaussian Process in Optical Fibre and Implication on the Spectral Efficiency

This work characterizes the spectral evolution of the Gaussian process in an optical fibre using Kolmogorov-Zakharov (KZ) model. At high power regime, the spectrum at receiver is calculated by iteratively solving KZ model at a shorter distance. It aims to demonstrate that a monotonically increasing spectral efficiency is impossible.