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Underwater optical fibers are used in seismographs

Underwater optical fibers are used in seismographs

The project includes the use of optical fibers located under the sea surface for detection seismic events. The creators of the idea are scientists from the National Physical Laboratory, University of Edinburgh, Instituto Nazionale de Rijquerca Metrologica. It’s also included in the search The Google.

The research team considered the possibilities of using distributed seismic detection. Pulses are sent via Optical fiberSpecial sensors “listen” to those who will bounce due to shocks.

The first attempts were made 3 years ago, when scientists used cables on the bottom of the ocean in Monterey Bay, California. At the time, engineers converted a 20-kilometre-long section of submarine fiber optics into the equivalent. 10000 seismic stations. During the search, a 3.5-magnitude shock and seismic dispersal from the underwater fault zones were recorded.

Another team from California Institute of Technology Work with Google previously demonstrated the use of polarization in submarine communication cables. The search has been expanded to include the use of functions repeaters. They are used to transmit signals over long distances and listen for the signal, as well as amplify and pass it along.

In the new analysis, the scientists used iterators to test which ones exist underwater optical fibers. They sent the signal over the cable connecting Great Britain and Canada. Then they checked the signals sent by the sensors.

They discovered seismic activity in The bottom of the Atlantic Ocean They were able to locate it at points between the sensors. Scientists have even recorded small earthquakes on the other side of the world, in Peru and Indonesia. The resulting “fiber-optic seismograph” is so sensitive that it has also been detected ‘Noise’ from moving ocean currents.

Scientists confirm that seismic research they surrender real time information. This could be very useful, among other things, for tsunami alerts that originate from underwater earthquakes.

The total length of all the underwater optical fibers in the world is about 750,000 miles, or up to 1,207,008 kilometres. So if in the future we can use the entire available network to investigate seismic events, we probably can Discover all the secrets of the underground.

In short, these are the cables that are used to transmit data Modified light waveinstead of electricity. The source of this light could be semiconductor laser or a light-emitting diode. They are basically immune to external electromagnetic interference.

Optical fiber It can be made of glass, plastic or semi-solid materials (most often gallium arsenide).

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