In this Letter, we demonstrate the coexistence of a prototype 200 Gb/s symmetrical coherent point-to-multipoint (PtMP) system with a 50G-PON prototype over 20 km of standard single mode fiber for next generation optical access networks. The optical path loss (OPL) of the coherent PtMP prototype exceeds 30.6 dB at 1544 nm in both directions, thus exceeding the N1 OPL class requirements. The prototype also achieves N1 OPL class requirements over the entire C-band. The experiments show full compatibility between the two systems, enabled by the wavelength plan. We also evaluate the ability of the coherent-PtMP system to support imbalanced terminations in terms of OPLs, to meet the already deployed optical access network requirements. The coherent-PtMP system flexibility is demonstrated through the reconfiguration of its subcarriers to transmit a maximum of 400 Gb/s in a single direction.

中文翻译：

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200 Gb/s 相干点对多点与 50G-PON 共存，实现下一代光接入


在这封信中，我们展示了原型 200 Gb/s 对称相干点对多点 (PtMP) 系统与超过 20 公里标准单模光纤的 50G-PON 原型的共存，用于下一代光接入网络。相干 PtMP 原型的光路损耗 (OPL) 在 1544 nm 处双向超过 30.6 dB，从而超出了 N1 OPL 等级要求。该原型还在整个 C 频段上达到了 N1 OPL 等级要求。实验表明，通过波长计划，两个系统之间完全兼容。我们还评估了相干 PtMP 系统支持 OPL 不平衡终端的能力，以满足已部署的光接入网络要求。相干 PtMP 系统的灵活性通过重新配置其子载波以在单向传输最大 400 Gb/s 的速度得到证明。