High-fidelity sub-petabit-per-second self-homodyne fronthaul using broadband electro-optic combs

Chenbo Zhang, Yixiao Zhu (), Jingjing Lin, Bibo He, Rongwei Liu, Yicheng Xu, Nuo Chen, Xuanjian He, Jinming Tao, Zhike Zhang, Tao Chu, Lilin Yi, Qunbi Zhuge, Weiwei Hu, Zhangyuan Chen, Weisheng Hu and Xiaopeng Xie ()
Additional contact information
Chenbo Zhang: Peking University
Yixiao Zhu: Shanghai Jiao Tong University
Jingjing Lin: Peking University
Bibo He: Peking University
Rongwei Liu: Peking University
Yicheng Xu: Shanghai Jiao Tong University
Nuo Chen: Zhejiang University
Xuanjian He: Zhejiang University
Jinming Tao: Chinese Academy of Sciences
Zhike Zhang: Chinese Academy of Sciences
Tao Chu: Zhejiang University
Lilin Yi: Shanghai Jiao Tong University
Qunbi Zhuge: Shanghai Jiao Tong University
Weiwei Hu: Peking University
Zhangyuan Chen: Peking University
Weisheng Hu: Shanghai Jiao Tong University
Xiaopeng Xie: Peking University

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: Abstract With the exponential growth in data density and user ends of wireless networks, fronthaul is tasked with supporting aggregate bandwidths exceeding thousands of gigahertz while accommodating high-order modulation formats. However, it must address the bandwidth and noise limitations imposed by optical links and devices in a cost-efficient manner. Here we demonstrate a high-fidelity fronthaul system enabled by self-homodyne digital-analog radio-over-fiber superchannels, using a broadband electro-optic comb and uncoupled multicore fiber. This self-homodyne superchannel architecture not only offers capacity boosting but also supports carrier-recovery-free reception. Our approach achieves a record-breaking 15,000 GHz aggregated wireless bandwidth, corresponding to a 0.879 Pb/s common public radio interface (CPRI) equivalent data rate. Higher-order formats up to 1,048,576 quadrature-amplitude-modulated (QAM) are showcased at a 100 Tb/s class data rate. Furthermore, we employ a packaged on-chip electro-optic comb as the sole optical source to reduce the cost, supporting a data rate of 100.5 Tb/s with the 1024-QAM format. These demonstrations propel fronthaul into the era of Pb/s-level capacity and exhibit the promising potential of integrated-photonics implementation, pushing the boundaries to new heights in terms of capacity, fidelity, and cost.

Date: 2024
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DOI: 10.1038/s41467-024-51103-4

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