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Single-Step Digital Backpropagation for O-band Coherent Transmission Systems

Published 18 Oct 2025 in eess.SP, cs.SY, and eess.SY | (2510.16482v1)

Abstract: We demonstrate digital backpropagation-based compensation of fibre nonlinearities in the near-zero dispersion regime of the O-band. Single-step DBP effectively mitigates self-phase modulation, achieving SNR gains of up to 1.6 dB for 50 Gbaud PDM-256QAM transmission over a 2-span 151 km SMF-28 ULL fibre link.

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