Leveraging Dispersion-Aware Phase Recovery for Long-Haul Digital Multi-Carrier Transmission: An Experimental Demonstration

In a subcarrier multiplexing 125 Gbaud DP-PCS-64QAM system with a net bitrate of 800 Gbit/s, we numerically and experimentally study the performance of transmission-aware carrier phase estimation (CPE) for long-haul systems. The recently proposed transmission-aware dual-reference subcarrier CPE (DRS...

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Bibliographic Details
Published in:Journal of lightwave technology 2022-08, Vol.40 (16), p.5432-5439
Main Authors: Neves, Manuel S., Lorences-Riesgo, Abel, Martins, Celestino S., Mumtaz, Sami, Frignac, Yann, Charlet, Gabriel, Monteiro, Paulo P., Dris, Stefanos, Guiomar, Fernando P.
Format: Article
Language:English
Subjects:
carrier phase estimation
coherent optics
multicarrier
Multiplexing
Optical communications
Optical fiber communication
Optical fiber dispersion
Phase estimation
Phase noise
Receivers
Signal to noise ratio
subcarrier-multiplexing
Subcarriers
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Summary:In a subcarrier multiplexing 125 Gbaud DP-PCS-64QAM system with a net bitrate of 800 Gbit/s, we numerically and experimentally study the performance of transmission-aware carrier phase estimation (CPE) for long-haul systems. The recently proposed transmission-aware dual-reference subcarrier CPE (DRS-CPE) is assessed against a more conventional per-subcarrier CPE approach and a transmission-agnostic joint CPE in 8- and 16-subcarrier transmission. At laser linewidths of \sim150 kHz, we achieve an experimental signal-to-noise ratio gain over a single-carrier of up to 0.5 dB after 1800 km transmission, enabled by the DRS-CPE.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2022.3176539