AI 中文总结
该研究开发新型超低损耗少模光纤，通过匹配改进高斯噪声模型等分析，证实其用于数据中心互连的准单模传输潜力，仅存在极小信噪比下降，可支持未来空分复用升级。
AI 中文摘要
本文实验研究了一种新型超低损耗少模光纤，用于在数据中心互连距离上实现准单模传输。在C波段对多径干扰进行了表征，将改进的高斯噪声模型与采用传统基于训练序列的数字信号处理获得的实验结果相匹配，从而实现了不中断业务的评估。该模型与专用未调制激光装置上进行的功率波动测量结果高度一致。本文还分析了均衡器长度和数字反向传播对系统性能的影响。与标准超低损耗单模光纤相比，传输实验显示，在24公里的距离上，采用高达42Gbaud的DP-256-QAM信号时，仅出现极小的信噪比下降。这些发现凸显了超低损耗少模光纤在可扩展、高容量数据中心互连应用中的潜力，同时为未来的空分复用升级提供了可能。
英文摘要
A novel ultra-low-loss few-mode fibre is experimentally investigated for quasi-single-mode transmission over data centre interconnect distances. Multipath interference is characterised across the C-band matching a modified Gaussian noise model to experimental results obtained with conventional training-sequence-based digital signal processing, enabling inservice assessment without traffic disruption. This model shows strong agreement with power-fluctuation measurements performed on a dedicated unmodulated-laser setup. The impact of equaliser length and digital backpropagation on system performance is also analysed. Compared with standard ultralow-loss single-mode fibres, transmission experiments reveal only minor signal-to-noise ratio degradation for up to 42-Gbaud DP-256-QAM over a 24-km span. These findings highlight the potential of ultra-low-loss few-mode fibre for scalable, highcapacity data centre interconnect applications while offering potential for future space-division multiplexing upgrades.
CommentsThis article has been accepted for publication in IEEE Photonics Technology Letters. This is the author's version which has not been fully edited and content may change prior to final publication. Citation information: DOI 10.1109/LPT.2026.3659618
