Signal-noise interaction in nonlinear optical fibers: a hydrodynamic approach

TL;DR

This paper introduces a hydrodynamic perturbative method to analyze signal-noise interactions in nonlinear optical fibers, providing a new analytical framework for different propagation regimes.

Contribution

It develops a novel hydrodynamic formulation of the nonlinear Schrödinger equation for studying signal-noise interactions in optical fibers.

Findings

Numerical validation shows high accuracy in the continuous-wave case.

The approach effectively models small-dispersion and solitonic regimes.

Provides a versatile analytical tool for fiber optics signal analysis.

Abstract

We present a new perturbative approach to the study of signal-noise interactions in nonlinear optical fibers. The approach is based on the hydrodynamic formulation of the nonlinear Schr\"odinger equation that governs the propagation of light in the fiber. Our method is discussed in general and is developed in more details for some special cases, namely the small-dispersion regime, the continuous-wave (CW) signal and the solitonic pulse. The accuracy of the approach is numerically tested in the CW case.