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arXiv · 2609.37551

End-to-End Optical Semantic Communication over a Nonlinear WDM Fiber Link

Hussein Jammal·Andrea Bianco·Cristina Rottondi
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Abstract

Emerging optical-network applications increasingly use received data for inference and control rather than exact source reproduction, creating an opportunity to trade bit-level fidelity for greater transmission reach and efficiency. We propose an end-to-end optical semantic communication system for joint image classification and reconstruction over a nonlinear wavelength-division multiplexed (WDM) fiber channel. The system maps each image directly into a fixed-length sequence of channel symbols that preserves task-relevant information, without explicit source compression or channel coding. Experiments on the MNIST dataset cover launch powers from -9 to +3 dBm, fiber lengths up to 800 km, and 16-, 64-, and 256-Quadrature Amplitude Modulation (QAM) formats. At 0 dBm, classification accuracy remains between 98.92% and 99.31% across all tested link lengths and modulation orders, while requiring fewer transmitted symbols than a Low-Density Parity-Check (LDPC)-coded JPEG baseline at every tested modulation order. These results show that semantic communication can simultaneously extend optical reach and reduce transmission resources by conveying only task-relevant information.

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Hussein Jammal, Andrea Bianco, Cristina Rottondi. 2026-09-29. End-to-End Optical Semantic Communication over a Nonlinear WDM Fiber Link. https://arxiv.org/abs/2609.37551

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