发表机构
LTCI Lab, Télécom Paris, Institut Polytechnique de Paris（巴黎理工学院电信学院 LTCI 实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文探讨在现有电信光纤网络上部署分布式声学传感（DAS）的机遇与挑战，回顾了带内共存、机械耦合、偏振分集双折射估计及激光相位噪声缓解等关键进展。
AI 中文摘要
本文重点阐述了在现有光通信网络上部署基于瑞利散射的分布式光纤传感（也称为分布式声学传感，DAS）的机遇与挑战。我们回顾了该领域近期的一些显著进展，并展望了未来方向。首先，我们简要回顾了DAS系统的分类，并重点讨论了使用连续波恒功率DAS探测信号在同一光纤上实现DAS与数据传输带内共存的优势。其次，我们强调了光纤、其承载光缆及其周围环境之间的机械耦合在提取应变信息解释中的重要作用。第三，我们展示了使用偏振分集DAS询问估计分布式双折射信息的结果。最后，我们研究了激光相位噪声对使用相位编码探测序列的连续波恒功率DAS询问的影响，并尝试对其进行缓解。
英文摘要
In this paper, we highlight opportunities and challenges of deploying Rayleigh-based distributed optical fiber sensing, also known as distributed acoustic sensing (DAS), over existing optical telecommunication networks. We review some of the prominent recent advances in this area and we shed light on future directions. First, we briefly review classifications of DAS systems and we focus on the advantages of using a continuous-wave constant-power DAS probe signal for in-band coexistence between DAS and data transmission over the same fiber. Second, we emphasize on the important role of the mechanical coupling between the fiber, its hosting cable and their surrounding environment in the interpretation of the extracted strain information. Third, we show results on the estimation of distributed birefringence information using a polarization-diversity DAS interrogation. Finally, we study the impact of laser phase noise on continuous-wave constant-power DAS interrogation using phase-encoded probing sequences and attempt to mitigate it.
