Optical interferometry-based array of seafloor environmental sensors using a transoceanic submarine cable
Optical interferometry-based array of seafloor environmental sensors using a transoceanic submarine cable
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DOI：
10.1126/science.abo1939
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发表时间：
2022-05-20
期刊：
影响因子：
56.9
通讯作者：
Curtis, A.
中科院分区：
文献类型：
--
作者：
Marra, G.;Fairweather, D. M.;Curtis, A.
基于光纤的传感技术可以利用现有的海底通信电缆作为海底传感器，从而极大地改善地球观测。先前基于干涉和偏振的技术证明了可在长达 10,500 公里的电缆长度上进行环境传感。然而，测量仅限于电缆整个长度上的积分变化。我们演示了在 5860 公里长的跨大西洋电缆中继器之间的各个跨度上（而不是整个电缆）检测地震和海洋信号。通过将该技术应用于现有的海底通信电缆（中继器到中继器的跨度为 45 至 90 公里），可以在基本上不受监控的海底安装数千个永久实时环境传感器，而无需更改水下基础设施。
Optical fiber-based sensing technology can drastically improve Earth observations by enabling the use of existing submarine communication cables as seafloor sensors. Previous interferometric and polarizationbased techniques demonstrated environmental sensing over cable lengths up to 10,500 kilometers. However, measurements were limited to the integrated changes over the entire length of the cable. We demonstrate the detection of earthquakes and ocean signals on individual spans between repeaters of a 5860-kilometer-long transatlantic cable rather than the whole cable. By applying this technique to the existing undersea communication cables, which have a repeater-to-repeater span length of 45 to 90 kilometers, the largely unmonitored ocean floor could be instrumented with thousands of permanent real-time environmental sensors without changes to the underwater infrastructure.