Experimental Demonstration of Geometrically-Shaped Constellations Tailored to the Nonlinear Fibre Channel
E. Sillekens, D. Semrau, D. Lavery, P. Bayvel, R.I. Killey
TL;DR
This paper experimentally demonstrates a geometrically-shaped 256-QAM constellation optimized for nonlinear optical fibre channels, outperforming traditional constellations by balancing shaping gain, nonlinearity, and impairments.
Contribution
It introduces a novel geometrically-shaped 256-QAM constellation tailored specifically for nonlinear fibre channels, showing improved performance over existing constellations.
Findings
Outperforms uniform and AWGN-tailored 256-QAM in experiments
Optimizes trade-off between shaping gain and nonlinearity
Demonstrates practical benefits in optical communication systems
Abstract
A geometrically-shaped 256-QAM constellation, tailored to the nonlinear optical fibre channel, is experimentally demonstrated. The proposed constellation outperforms both uniform and AWGN-tailored 256-QAM, as it is designed to optimise the trade-off between shaping gain, nonlinearity and transceiver impairments.
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