Optimization of Long-Haul C+L+S Systems by means of a Closed Form EGN Model

TL;DR

This paper presents a closed-form EGN model for optimizing long-haul C+L+S systems, achieving significant throughput improvements and flat spectrum performance through power and Raman pump optimization.

Contribution

It introduces a novel closed-form EGN model for C+L+S systems and demonstrates optimized launch power and Raman pump settings for enhanced throughput.

Findings

Up to 4x throughput increase over legacy systems

Achieved flat GSNR within +/-0.5 dB across spectrum

Effective power and Raman pump optimization methods

Abstract

We investigate C+L+S long-haul systems using a closed-form GN/EGN non-linearity model. We perform accurate launch power and Raman pump optimization. We show a potential 4x throughput increase over legacy C-band systems in 1000 km links, using moderate S-only Raman amplification. We simultaneously achieve extra-flat GSNR, within +/-0.5 dB across the whole C+L+S spectrum.