Gas Line Absorption Mitigation in Hollow-Core Fibre using Spectral Pre-Equalisation

TL;DR

This paper demonstrates a digital spectral pre-equalisation technique to mitigate CO2 gas absorption in hollow-core fibre transmission, significantly reducing signal degradation and outperforming traditional equalisation methods.

Contribution

The study introduces a spectral pre-equalisation method that effectively compensates for gas-line absorption, achieving better performance than existing equalisation approaches.

Findings

5.5 dB reduction in Q-factor penalty

Outperforms 383-tap equaliser by 1.3 dB

Effective mitigation of CO2 absorption effects

Abstract

We study the impact of CO 2 absorption on hollow-core fibre transmission. Using spectral pre-equalisation, we digitally post-compensate gas-line absorption and show a 5.5 dB reduction in Q-factor penalty, outperforming a 383-tap equaliser by 1.3 dB.