https://youtu.be/8939X_kFwG4?is=jGBXjUpU9_xcxLFn
So intriguing. Detecting back-scatter reflections that occur at temperature or pressure points in fiberoptic cable can be used to efficiently monitor oil boreholes, seismic activity, elephants walking onto Indian railroads, whales singing in the ocean, and tankers or submarines. Telecom companies often lay down excess cable capacity, and these as-yet unused fibers can be used for such monitoring.
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