Academic paper

On the Impact of Gas-Line Absorption in Long-Haul C+L-Band Hollow-Core Fibre Transmission

Authors: Zelin Gan, Eric Sillekens, Jiaqian Yang, Ronit Sohanpal, Mindaugas Jarmolovi\v{c}ius, Romulo Aparecido, Robert I. Killey, Polina BayvelPublished: 2026-08-03Paper ID: 2608.02228Category: eess.SPLicense: CC BY 4.0

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Abstract

We numerically investigate gas-line absorption in hollow-core fibre C+L-band transmission. Results show limited C-band but severe L-band performance degradation. Ideal suppression enables a 1.5$\times$ higher L-band throughput, reaching 59.1 Tb/s over 1000 km, while reducing repeater number by up to 3.3$\times$.

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