50G-PON引入和减缓技术对拉曼散射的影响

IF 4 2区 计算机科学 Q1 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Journal of Optical Communications and Networking Pub Date : 2024-12-18 DOI:10.1364/JOCN.542178
Gael Simon;Lise Pichard;Fabienne Saliou;Jeremy Potet;Dylan Chevalier;Philippe Chanclou
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引用次数: 0

摘要

本文探讨了多代PON共享同一光分配网络时受激拉曼散射(SRS)的影响。50G-PON是最后一种指定的ITU-T PON,要求使用高发射功率来满足强光路损耗要求。我们发现XGS-PON上游可能是50G-PON引入的第一个受害者,因为它的波长间距最大化了拉曼散射。我们利用一个模型来描述srs在XGS-PON上引起的损耗。假设50G-PON将部署在当前的无源基础设施上,我们还利用现场数据来精确预测超出需求的终端数量。结果表明,在光纤距离为20 km的情况下,XGS-PON上行信号的损失可达1.8 dB, 50G-PON上行信号的损失可达1.3 dB, G-PON上行信号的损失可达0.5 dB。根据我们的现场数据分析,高达3%的终止可能会受到影响。通过更好的光电二极管、信号处理或前向纠错来提高接收机的灵敏度,可以放松高发射功率的限制,从而提高SRS。在中心办公室部署光分路器也可以在满足高分路比的同时限制实际发射到光纤中的功率。最后,减少50G-PON下游波长似乎是减轻拉曼散射的可能选择。
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Raman scattering impairments caused by 50G-PON introduction and mitigation techniques
We explore the impact of stimulated Raman scattering (SRS) in the context of multiple PON generations sharing the same optical distribution network. The 50G-PON, being the last specified ITU-T PON, imposes the use of high launch power to meet strong optical path loss requirements. We show that the XGS-PON upstream could be the first victim of the introduction of 50G-PON since its wavelength spacing maximizes Raman scattering. We exploit a model to describe both in simulation and experiment the SRS-induced depletion on XGS-PON. Assuming that 50G-PON will be deployed on the current passive infrastructure, we also exploit field data to precisely predict the amount of terminations exceeding the requirements. The results show that up to 1.8 dB can be lost on XGS-PON upstream signals, 1.3 dB on the 50G-PON upstream, and 0.5 dB on the G-PON upstream, over a distance of 20 km of fiber. Up to 3% of terminations may be affected, according to our field data exploitation. Improving the receivers’ sensitivity through either better photodiodes, signal processing, or forward error correction could relax the high launch power constraints, and thus the SRS. Deploying an optical splitter at the central office could also limit the power actually launched into the fiber while meeting high split ratios. Finally, decreasing the 50G-PON downstream wavelength seems a possible option to mitigate the Raman scattering.
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来源期刊
CiteScore
9.40
自引率
16.00%
发文量
104
审稿时长
4 months
期刊介绍: The scope of the Journal includes advances in the state-of-the-art of optical networking science, technology, and engineering. Both theoretical contributions (including new techniques, concepts, analyses, and economic studies) and practical contributions (including optical networking experiments, prototypes, and new applications) are encouraged. Subareas of interest include the architecture and design of optical networks, optical network survivability and security, software-defined optical networking, elastic optical networks, data and control plane advances, network management related innovation, and optical access networks. Enabling technologies and their applications are suitable topics only if the results are shown to directly impact optical networking beyond simple point-to-point networks.
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