Experimental validation of the closed-form GN model accounting for distributed Raman amplification in an S+C+L-band hybrid amplified long-haul transmission system

TL;DR

This paper experimentally validates a closed-form GN model for nonlinear interference in a long-haul hybrid S+C+L band optical transmission system with Raman amplification, demonstrating high accuracy in SNR estimation.

Contribution

It provides the first experimental validation of a closed-form GN model accounting for distributed Raman amplification in long-haul systems.

Findings

Model estimates nonlinear interference with less than 0.6 dB SNR error.

Accurate prediction of ASE and nonlinear effects in hybrid amplification systems.

Validates the model's applicability for system design and optimization.

Abstract

The accuracy of a recently-developed closed-form GN nonlinear interference model is evaluated in experimental 1065 km S+C+L band WDM transmission with backward Raman pumping. The model accurately estimates the nonlinear interference and ASE with total SNR error of less than 0.6 dB.