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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Sygletos, Stylianos
Aston University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (3/3 displayed)
- 2024Experimental Demonstration of 4-Port Photonic Reservoir Computing for Equalization of 4 and 16 QAM Signalscitations
- 2024Online digital compensation of phase and amplitude distortions in cascaded FOPA transmission links
- 2023Machine learning enabled compensation of phase-to-amplitude distortion due to imperfect pump-dithering in optical phase conjugated transmission systems
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document
Online digital compensation of phase and amplitude distortions in cascaded FOPA transmission links
Abstract
Today mitigating stimulated Brillouin scattering (SBS) remains a significant challenge for the eventual penetration of fibre-optical parametric amplifiers (FOPAs) into future communication systems. The pump phase modulation that is often used for SBS mitigation causes temporal variation of the parametric gain, which is primarily a source of phase distortion for coherently detected quadrature-amplitude modulation (QAM) signals. Here, we introduce a new and fully online digital signal processing (DSP) scheme that enables compensation of the intrinsic dithering-induced phase distortion and its conversion into amplitude distortion when interacting with the dispersive fibre channel in transmission systems with cascaded FOPAs operating with multi-tone pump dithering to support sufficient SBS-limited gain. Through extensive numerical simulations, we identify the required dimensioning for performance improvement and evaluate the scheme's robustness against non-ideal conditions. We demonstrate that enhancing a conventional DSP chain with the proposed algorithm achieves significant performance benefits in 28-Gbaud 16-QAM transmission. We believe that our scheme may become a key component of future FOPA-amplified links, where pump dithering will be necessary to achieve high amplification gains.