【摘要】 2021年国际电联电信标准化部门(ITU-T)完成50 Gbit/s无源光网络(PON)的标准制定，当前设备商和运营商已经完成样机验证，ITU-T成立Beyond 50 Gbit/s PON讨论组开始研讨未来PON相关技术方案，因此Beyond 50 Gbit/s PON成为当前光通信领域的研究热点。根据前几代PON标准的速率演进规律推测，Beyond 50 Gbit/s PON的速率预计将超过100 Gbit/s。文章将分析超100 Gbit/s PON面临的问题和挑战，重点介绍灵活速率PON和相干PON架构这两个潜在技术路径及其关键技术方案，为未来超100 Gbit/s PON的研究和标准制定提供参考。更多还原

【Abstract】 In 2021, the International Telecommunication Union Telecommunication Standardization Sector(ITU-T) has developed the standards of 50 Gbit/s Passive Optical Network(PON). Recently, the equipment manufacturers and operators have completed prototype verification. Nowadays, ITU-T establishes the Beyond 50 Gbit/s PON discussion group to start discussing future PON-related technical solutions Beyond 50 Gbit/s PON has become a research hotspot in the field of optical communication. According to the evolutional law of the previous PON standards, the data rate of Beyond 50 Gbit/s PON will be higher than 100 Gbit/s. This article will analyze the problems and challenges faced by 100 Gbit/s PON, focusing on two potential technological paths: flexible-rate PON and coherent PON architecture, and their key technical solutions, providing references for future research and standard of 100 Gbit/s PON.更多还原