AI 中文总结
该研究针对城域与接入网络融合需求，采用空芯光纤结合数字副载波复用收发器优化马蹄形-分支网络，实现分支功率预算增益，可通过减少放大器收回光纤成本溢价。
AI 中文摘要
城域与接入网络融合为统一光基础设施，需要替代传统实心芯光纤（SCF）的高性价比方案。本文研究在马蹄形-分支无滤波器光架构中采用空芯光纤（HCF）结合数字副载波复用（DSCM）收发器。利用HCF的超低非线性，我们优化放大器部署，在实际约束下最大化功率预算。结果表明，HCF将主要限制从非线性转移到放大器输出功率，相比SCF可实现高达20dB的分支功率预算增益。考虑平衡与非平衡耦合器，我们发现增加放大器密度仅在达到饱和点前提升传输距离（5个传输节点网络中约11-13个单元）。混合SCF-HCF部署的技术经济盈亏分析显示，定向使用HCF可提供中间性能提升，并通过减少放大器完全收回其光纤成本溢价。
英文摘要
The convergence of metro and access networks into unified optical infrastructures requires cost-effective alternatives to conventional solid-core fiber (SCF). This paper examines using hollow-core fiber (HCF) with digital subcarrier multiplexing (DSCM) transceivers in horseshoe-and-spur filterless optical architectures. Leveraging HCF's ultra-low nonlinearity, we optimize amplifier placement to maximize power budgets under realistic constraints. Our results show that HCF shifts the main limitation from nonlinearity to amplifier output power, enabling up to a 20 dB spur power-budget gain over SCF. Considering balanced and unbalanced couplers, we find that increasing amplifier density boosts reach only up to a saturation point (about 11-13 units in a 5-transit-node network). A techno-economic break-even analysis of hybrid SCF-HCF deployments shows that targeted HCF use provides intermediate performance gains and can fully recover its fiber cost premium through amplifier reductions.
CommentsAccepted for oral presentation at Globecom 2026
