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Monday, 30 October 2017

Data exchange by light: wireless Internet faster than fiber?



The arrival of optical fiber in households has been a revolution in the speed of Internet connections but they remain dependent on the installation of cables. If these cables are cut, then access to the network is impossible. That's why scientists have developed a technology that will eliminate these cables while offering even faster connection speeds.


These engineers discovered in the light the means of "twisting" the photons in a way that not only compacted more data in each transmission, but also survived turbulent air interference. If you pass the light through a specific hologram, you can give the photons an optical angular momentum that allows them to carry more than 1 and 0. As long as the phase and intensity of the light are correct, you can transmit these data over long distances.

The research team has successfully tested this principle on a 1.6 km stretch in Germany while ensuring that it takes place in an urban environment where air turbulence and the presence of higher buildings should theoretically prevent the connection.

However, there is still a lot of work before this type of wireless network proves effective. For example, we will have to ensure that a very large number of people can benefit from this technology. It will also be necessary to ensure that the speed is not affected by inclement weather such as rain or snow.

With this advancement, instead of having to carefully wire homes and offices to multi-gigabit speeds, Internet Service Providers (FAI) could use light-based wireless links to cover large areas. of their network. The wiring would then be installed only when absolutely necessary.

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