Abstract

This Letter presents an experimental demonstration of a visible light communication system utilizing a LiNbO₃ external modulator to support the transmission of pulse amplitude modulation (PAM)-4 signals. To solve the problem of the low-frequency fluctuations and inter-symbol interference (ISI) introduced by the external modulator-based system, a neural network with a low-frequency signal as the second label (LFNN) is proposed. A data rate of 8.8 Gbps using PAM-4 is experimentally achieved under the 7% hard-decision forward error correction (HD-FEC) bit-error-ratio (BER) limit of 3.8 × 10⁻³. To the best of our knowledge, this work represents the highest transmission data rate achieved thus far using external modulation in visible light communication systems.

© 2023 Optica Publishing Group

8.75 Gbps visible light communication link using an artificial neural network equalizer and a single-pixel blue micro-LED

Zixian Wei, Zhongxu Liu, Xin Liu, Lei Wang, Lai Wang, Changyuan Yu, and H. Y. Fu
Opt. Lett. 46(18) 4670-4673 (2021)

11.2 Gbps 100-meter free-space visible light laser communication utilizing bidirectional reservoir computing equalizer

Zhilan Lu, Jifan Cai, Zengyi Xu, Yuning Zhou, Junwen Zhang, Chao Shen, and Nan Chi
Opt. Express 31(26) 44315-44327 (2023)

Adaptive Bayesian neural networks nonlinear equalizer in a 300-Gbit/s PAM8 transmission for IM/DD OAM mode division multiplexing

Sitong Zhou, Xinyu Liu, Ran Gao, Ziyun Jiang, Han Zhang, and Xiangjun Xin
Opt. Lett. 48(2) 464-467 (2023)

Optical amplification-free deep reservoir computing-assisted high-baudrate short-reach communication

Mengyao Han, Muguang Wang, Yuchuan Fan, Toms Salgals, Hadrien Louchet, Richard Schatz, Markus Gruen, Fabio Pittala, Benjamin Krüger, Thomas Dippon, Lu Zhang, Xianbin Yu, Sandis Spolitis, Vjaceslavs Bobrovs, Sergei Popov, Xiaodan Pang, and Oskars Ozolins
Opt. Lett. 48(8) 2122-2125 (2023)

Sub-column pixel neural network scheme for modulation format shifting based optical camera communications

Jin Shi, Jing He, and Xinda Yan
Opt. Lett. 48(1) 85-88 (2023)