256 GBaud RRM-based OOK Link in C-band Enabled by Neural Network Equalization
Journal of Lightwave Technology 2025
Dan Li, Yevhenii Osadchuk, Armands Ostrovskis, Toms Salgals, Francesco Da Ros, Carlos Natalino, Darko Zibar, Lu Zhang, Xianbin Yu, Vjačeslavs Bobrovs

With the AI boom, data center interconnects require higher symbol rates and throughput. Intensity modulation and direct detection (IM/DD) is a cost-effective candidate for short-reach optical links. Ring resonator-based modulators (RRMs) with broad bandwidth have emerged as a promising solution for high-speed IM/DD links. However, RRMs introduce nonlinear impairments, which can cause rate bottlenecks in IM/DD. In this work, we demonstrate up to 256 GBaud RRM-based optical amplification-free on-off keying links enabled by two NN-based equalizers. To the best of our knowledge, this work is the first RRM-based IM/DD demonstration of a 256 GBaud OOK link. We achieve bit-errorratio below the 7% overhead hard-decision forward error correction threshold after transmission over 100 m single-mode fiber (SMF) for all considered symbol rates. Our work outperforms recent state-of-the-art RRM-based IM/DD studies by applying NN equalization using a 42-GHz bandwidth RRM with a driving voltage of 2.7-Vpp. The achieved performance and complexity analysis reported in this work are a key step towards future implementations of NN-based equalizers in hardware to enable high-symbol-rate IM/DD systems.


Atslēgas vārdi
Intensity modulation and direct detection; Neural networks; Optical interconnects; Ring resonator-based modulator links
Hipersaite
https://www.scopus.com/pages/publications/105013894108

Li, D., Osadchuk, Y., Ostrovskis, A., Salgals, T., Da Ros, F., Natalino, C., Zibar, D., Zhang, L., Yu, X., Bobrovs, V. 256 GBaud RRM-based OOK Link in C-band Enabled by Neural Network Equalization. Journal of Lightwave Technology, 2025, Vol. 9, No. 9, 1.-10.lpp. ISSN 0733-8724.

Publikācijas valoda
English (en)
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