Due to the higher bandwidth requirements of the user, the multi-wavelength based next-generation Ethernet passive optical network (NG-EPON) has emerged to provide potential solutions for the wide-range coverage and to accommodate multiple consumers per fiber. In this paper, the stimulated Raman scattering (SRS) effect in NG-EPON systems is studied, where upstream and downstream wavelengths are both located in the O-band. The influence of SRS effect on the 4 × 25G and 8 × 25G NG-EPON wavelengths is investigated, and it involves two aspects, including the SRS-induced crosstalk and power depletion. For the former, owing to the short interaction time between upstream and downstream wavelengths, the SRS-induced crosstalk on the bit error rate (BER) performance of the 4-channel and 8-channel NG-EPON systems can be neglected. For the latter case, 1.3 dB power depletion can be subjected to the 4-channel NG-EPON system, when the launched power of the downstream wavelength is 12 dBm and the fiber length is 40 km. Furthermore, with the increase of number of channels, the SRS causes more severe impact on the 8-channel NG-EPON system, leading towards the 2.9-dB power depletion. The given results could be useful in providing practical contributions for the designing of future NG-EPON systems.

中文翻译：

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NG-EPON系统设计中受激拉曼散射效应的研究

由于用户对带宽的更高要求，基于多波长的下一代以太网无源光网络（NG-EPON）应运而生，为大范围覆盖提供潜在解决方案，并在每根光纤上容纳多个消费者。在本文中，研究了 NG-EPON 系统中的受激拉曼散射 (SRS) 效应，其中上行和下行波长都位于 O 波段。研究了SRS效应对4×25G和8×25G NG-EPON波长的影响，涉及SRS引起的串扰和功率损耗两个方面。对于前者，由于上下行波长交互时间短，SRS引起的串扰对4通道和8通道NG-EPON系统误码率（BER）性能的影响可以忽略不计。对于后一种情况，1。当下行波长的发射功率为12dBm，光纤长度为40km时，4通道NG-EPON系统可以承受3dB的功率损耗。此外，随着通道数的增加，SRS对8通道NG-EPON系统的影响更加严重，导致2.9-dB的功率损耗。给出的结果可能有助于为未来 NG-EPON 系统的设计提供实际贡献。