System calibration for single-wavelength multi-terabit mode-division multiplexing free-space optical communication systems
Year: 2025
Type: article
Abstract: In this paper, we propose a optical calibration strategy to support a single-wavelength mode-division multiplexing multiple-input multiple-output free-space optical communication system utilising 6 Hermite-Gaussian modes. To minimise the inter-mode crosstalk, higher-order modes at the receiver were exploited to calibrate the optical setup. The signal distortions were minimised for 80 GBaud signals by employing Volterra pre-distortion. Probabilistically-shaped 256-QAM signals were transmitted to maximise the achievable information rate. As a result, this system obtained a record-high achievable information rate of 4.49 Tbit/s/ λ in free-space optical communications.
Source: Optics Express
DOI: 10.1364/oe.569397
Authors: Yiming Li, Gil Fernandes, David Benton, Antonin Billaud, Marco Fernandes, Mohammed Patel, Fernando Guiomar, Andrew Ellis
Institutions: University of Aveiro, Aston University, Cailabs (France)
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
Awards: G1561969670, G2032980657, International Mobility and Training in Photonics Programme, High Dimensional Wireless Passive Optical Networking for Access Deployment (PON-HD), Photonic Phase Conjugation Systems (PHOS), EPSRC-SFI:Energy Efficient M Communication using Combs (EEMC), Comunicações Óticas Sem Fios de Próxima Geração Suportadas por Inteligência Artificial, G7607990019
OpenAlex ID: W4413288941