节能型空芯光纤传输

中文摘要 AI 辅助

空芯光纤（HCFs）是提高相干传输系统吞吐量的一种有前景的手段。除了在低延迟、非线性和衰减方面的优势外，空芯光纤还有可能通过减少中继器数量和支持比单模光纤（SMF）链路更高效的调制格式，来提高相干传输系统的能效。然而，链路参数（如发射功率、放大器效率和收发器噪声）与能效之间的关系尚未被探索。在这项工作中，我们研究了空芯光纤传输系统中的节能工作区间。我们表明，在单模光纤系统中，每比特的最优能量最终受吞吐量限制——最大化吞吐量将使每比特能量最小化。相比之下，空芯光纤的收发器受限吞吐量导致了两个独立的发射功率最优点——最小每比特能量和最大吞吐量。我们推导了一个关于空芯光纤链路最小每比特能量发射功率的闭式方程，该方程以链路参数表示，包括放大器效率、收发器功耗和链路增益。我们使用我们的模型来探索跨距长度和光纤衰减在两种工作区间中的影响，展示了每比特能量考虑如何显著影响最优跨距长度。针对能效进行优化可以在3000公里处仅以3%的吞吐量损失为代价，实现链路每比特能量降低50%，同时还将所需的放大器发射功率从>33 dBm降低到<23 dBm。这项工作强调了在空芯光纤链路设计中纳入物理层能量考虑的重要性。

英文摘要

Hollow-core fibres (HCFs) are a promising means of increasing the throughput of coherent transmission systems. In addition to their advantages in terms of low latency, nonlinearity and attenuation, HCFs can potentially improve the energy efficiency of coherent transmission systems by reducing the number of repeaters and enabling more efficient modulation formats than SMF links. However, the relationship between the link parameters (e.g. launch power, amplifier efficiency and transceiver noise) and the energy efficiency has not been explored. In this work, we investigate energy-efficient operating regimes in HCF transmission systems. We show that the optimum energy per bit in SMF systems is ultimately throughput-limited - maximising throughput will minimise energy per bit. In contrast, the transceiver-limited throughput of HCF leads to two separate launch power optima - minimum-energy-per-bit and maximum-throughput. We derive a closed-form equation for the minimum-energy-per-bit launch power for HCF links in terms of the link parameters, including the amplifier efficiency, transceiver power consumption and link gain. We use our model to explore the impact of span length and fibre attenuation in both operating regimes, showing how energy per bit considerations significantly impact the optimum span length. Optimising for energy efficiency can lead to 50% reduction in link energy per bit for only a 3% throughput penalty at 3000 km, whilst also reducing the required amplifier launch power from >33 dBm to <23 dBm. This work highlights the importance of including physical layer energy considerations in HCF link design.

发表机构

• UCL (University College London)（伦敦大学学院）

机构由 AI 辅助整理，请以论文原文为准。