With 10G time division multiplexed passive optical network (TDM-PON) systems ready for massive deployment worldwide, the next generation PON standards are being intensively discussed in both IEEE and ITU-T. Compared with the IEEE’s wavelength stacked ${2}{ *}{25}\text{G}$2∗25G solution, the ITU-T’s single carrier non-return-to-zero-based 50G TDM-PON has the advantages of low cost, easy operation, and convenient management. However, the 50G TDM-PON will also have to face great challenges in real-world operating conditions. In this paper, we will illustrate the unique role for digital signal processing (DSP) in solving the challenges for the next generation 50G TDM-PON systems, such as device bandwidth limitation, dispersion induced power penalty, and high link budget. To analyze DSP’s feasibility in this application, potential issues such as cost and interoperability are analyzed. Through offline experiments and prototype demonstrations, DSP’s role in enabling next generation single carrier 50G TDM-PON is highlighted.

中文翻译：

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支持DSP的下一代50G TDM-PON

随着10G时分复用无源光网络（TDM-PON）系统准备在全球范围内大规模部署，IEEE和ITU-T都在对下一代PON标准进行深入的讨论。与IEEE的波长堆叠$ {2} {*} {25} \ text {G} $ 2 * 25G解决方案相比，ITU-T的基于单载波不归零的50G TDM-PON的优点是成本高，操作简便，管理方便。但是，在实际操作条件下，50G TDM-PON也将面临巨大挑战。在本文中，我们将说明数字信号处理（DSP）在解决下一代50G TDM-PON系统所面临的挑战中的独特作用，例如设备带宽限制，色散引起的功率损失和高链路预算。为了分析DSP在此应用中的可行性，分析了诸如成本和互操作性之类的潜在问题。通过离线实验和原型演示，DSP在实现下一代单载波50G TDM-PON方面的作用得到了强调。