We propose an ultradense wavelength-division-multiplexing (WDM) network architecture that dramatically enhances channel accommodation density to achieve extremely high spectral efficiency. The trade-offs between high spectral efficiency and severe signal impairment due to optical filtering are resolved by network optimization of the overlaid subnetworks based on fiber-granular routing and wavelength-granular add/drop operations. The spectrum narrowing induced by node operations is well controlled by the impairment-suppressing routing and wavelength assignment (RWA) method. Numerical simulations on several metro-scale network topologies verify that the proposal enhances the spectral efficiency by up to 31.0% compared to comparable dense WDM networks.

中文翻译：

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通过重叠环形拓扑结构上的光纤颗粒路由实现高光谱效率光子网络的设计和控制

我们提出了一种超密集波分复用 (WDM) 网络架构，可显着提高信道容纳密度以实现极高的频谱效率。通过基于光纤粒度路由和波长粒度分插操作的重叠子网的网络优化，解决了高频谱效率和由于光滤波导致的严重信号损伤之间的权衡。节点操作引起的频谱变窄可以通过减损抑制路由和波长分配 (RWA) 方法得到很好的控制。对几个城域规模网络拓扑的数值模拟证实，与类似的密集 WDM 网络相比，该提议将频谱效率提高了 31.0%。