A team of researchers from Norway has modified some underwater fiber optic cables to eavesdrop on whales in the Arctic Circle to keep them safe from ships.
novel way to modify fiber optic cables
DAS, in case you are unaware, is a technology that uses fiber optic cables to detect and measure acoustic signals or vibrations along the entire length of the cable. The basic principle behind DAS is monitoring backscattered light within the fiber optic cable, which is sensitive to external acoustic or vibrational events. When the cable experiences vibrations, the light traveling inside the fiber optic cable is scattered, and some returns to the source.
The first underwater fiber-optic cable was set up in the 1850s between Newfoundland and Ireland to carry telegraph signals. Nowadays, submarine telecommunications cables stretch 550,000 miles of our oceans and seas, allowing data to be transmitted between continents and islands.
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