2 research outputs found
Optical interferometry-based array of seafloor environmental sensors using a trans-oceanic submarine cable
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 polarization-based 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
Transforming Subsea Optical Cables into a Giant Network of Environmental Sensors
We show that seafloor-cables, when combined with ultra-stable interferometry, can act as arrays of environmental sensors for earthquakes, ocean currents and other ocean signals, with potentially game-changing applications in Earth monitoring