Abstract

Coherent passive optical network (PON) has been proposed to support the next generation high-speed optical access network owing to the superior receiver sensitivity and thereby the extended power budget for 100 G-and-beyond. In addition, PON's flexibility and adaptability are gaining increasing interest. Flexible PON is believed to be a powerful solution in optimizing the overall capacity based on the available channel conditions, i.e., the optical path loss (OPL) and the associated signal-to-noise ratio and nonlinearity impairments of the different groups of optical network units. In this study, we demonstrate the rate-flexible coherent TDM-PON in burst-mode based on probabilistic-shaping (PS) QAM modulations and local oscillator (LO) power adjustment technology, achieving a 300G peak rate and ultra-wide dynamic range. The principle, the burst-mode frame generation as well as the burst-mode signal processing are discussed in detail. To indicate the overall performance of achievable capacity and flexibility, a new metric, namely, dynamic-range and net-rate product (DRNRP) is introduced as the indicator to show the optimized throughput. Finally, we experimentally demonstrated a flexible coherent TDM-PON in burst-mode based on 25-GBaud PS-QAMs with the dynamic range of >35-dB in back-to-back. A record DRNRP up to 7,104 dB·Gbps was achieved in the current system with net data rate varying from 255-Gbits/s to 85-Gbits/s as the OPL varies over 20-km fiber transmission.

End-to-end deep learning for a flexible coherent PON with user-specific constellation optimization

Sizhe Xing, Zhongya Li, Changle Huang, Guoqiang Li, Aolong Sun, An Yan, Wangwei Shen, Jianyang Shi, Ziwei Li, Chao Shen, Nan Chi, and Junwen Zhang
J. Opt. Commun. Netw. 16(1) 59-70 (2024)

Principle and strategy of using probabilistic shaping in a flexible coherent passive optical network without optical amplifiers

Sizhe Xing, Guoqiang Li, An Yan, Wangwei Shen, Zhongya Li, Jiaye Wang, Jianyang Shi, Zhixue He, Nan Chi, and Junwen Zhang
J. Opt. Commun. Netw. 15(8) 507-517 (2023)

Efficient preamble design and digital signal processing in upstream burst-mode detection of 100G TDM coherent-PON

Junwen Zhang, Zhensheng Jia, Mu Xu, Haipeng Zhang, and Luis Alberto Campos
J. Opt. Commun. Netw. 13(2) A135-A143 (2021)

Beyond 100G three-dimensional flexible coherent PON with time, frequency, and power resource-allocation capabilities

Wangwei Shen, Guoqiang Li, Sizhe Xing, Zhongya Li, An Yan, Jiaye Wang, Nan Chi, and Junwen Zhang
J. Opt. Commun. Netw. 16(5) 516-526 (2024)

Time-variant entropy regulated multiple access for flexible coherent PON

Zixian Wei, Jinsong Zhang, Weijia Li, and David V. Plant
Opt. Lett. 47(19) 5148-5151 (2022)