Abstract

As the broadband applications continue rising, the solutions of high-speed passive optical network (PON) with large power budget are highly desired. Direct detection scheme combined with digital signal procession (DSP) has been considered as a promising candidate due to its low cost, low power consumption and simple architecture. In this paper, we experimentally demonstrate 200 Gb/s/λ and 240 Gb/s/λ time division multiplexed passive optical network (TDM-PON) downstream transmissions based on four-level pulsed amplitude (PAM-4) modulation with direct detection in O-band. A high bandwidth thin film lithium niobate modulator is adopted to generate high Baudrate optical signal at the optical line terminal (OLT) side. A pre-amplified semiconductor optical amplifier SOA is employed at the optical network unit (ONU) side to improve the power budget. Several DSP algorithms are studied to compensate the linear and nonlinear distortions. We also propose a simplified Volterra nonlinear equalizer (S-VNLE) to reduce the computational complexity. Considering the soft-decision FEC (SD-FEC) threshold (1 × 10⁻²), over 29 dB and 28 dB power budgets are achieved respectively for 200 Gb/s/λ and 240 Gb/s/λ PON system after 20 km standard single mode fiber (SSMF) based on our proposed S-VNLE.

Demonstration of symmetrical 50-Gb/s TDM-PON in O-band supporting over 33-dB link budget with OLT-side amplification

Chengcheng Li, Jian Chen, Zhengxuan Li, Yingxiong Song, Yingchun Li, and Qianwu Zhang
Opt. Express 27(13) 18343-18350 (2019)

Low-complexity Volterra-inspired neural network equalizer in 100-G band-limited IMDD PON system

Luyao Huang, Wenqing Jiang, Yongxing Xu, Weisheng Hu, and Lilin Yi
Opt. Lett. 47(21) 5692-5695 (2022)

200 Gbit/s/λ PDM-PAM-4 PON system based on intensity modulation and coherent detection

Jiao Zhang, Jianjun Yu, Xinying Li, Kaihui Wang, Wen Zhou, Jiangnan Xiao, Li Zhao, Xiaolong Pan, Bo Liu, and Xiangjun Xin
J. Opt. Commun. Netw. 12(1) A1-A8 (2020)

400Gb/s real-time coherent PON based on a silicon photonic integrated transceiver

Ming Li, Jie Li, Ming Luo, Rong Hu, Xu Zhang, Honggang Zhang, Daigao Chen, Qiongxia Shen, Xiang Li, and Xi Xiao
Opt. Express 30(26) 47847-47855 (2022)

Design and analysis of high-speed optical access networks in the O-band with DSP-free ONUs and low-bandwidth optics

Kuo Zhang, Qunbi Zhuge, Haiyun Xin, Zhenping Xing, Meng Xiang, Sujie Fan, Lilin Yi, Weisheng Hu, and David V. Plant
Opt. Express 26(21) 27873-27884 (2018)