Wi-fi on rays of infrared light:

[BADecker]

Wi-fi on rays of infrared light:

Researchers at Eindhoven University of Technology have come up with a solution to slow wifi. Use a wireless network based on harmless infrared rays. The capacity is not only huge (more than 40Gbit/s per ray) but also there is no need to share since every device gets its own ray of light. This was the subject for which TU/e researcher Joanne Oh received her PhD degree with the 'cum laude' distinction last week.

The system conceived in Eindhoven is simple and, in principle, cheap to set up. The wireless data comes from a few central 'light antennas', for instance mounted on the ceiling, which are able to very precisely direct the rays of light supplied by an optical fiber. Since there are no moving parts, it is maintenance-free and needs no power: the antennas contain a pair of gratings that radiate light rays of different wavelengths at different angles ('passive diffraction gratings').

Read more at http://www.nextbigfuture.com/2017/03/wi-fi-on-rays-of-infrared-light-100.html.

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[MisO69]

Its neat but requires direct line of sight. If something blocks that then you have no internet.

Doing this building to building would work but still with rain or snow the light will get blocked and network goes down.

[Spoetnik]

I wonder if this would be better than the laser tech already in use.
For example the ISS space station has been using lasers for ages for WIFI.

It's been tested and works.
For example they beamed down an HD video with it years ago.
And they have big expansion plans for the scheme.. Google it

[BADecker]

Its neat but requires direct line of sight. If something blocks that then you have no internet.

Doing this building to building would work but still with rain or snow the light will get blocked and network goes down.

There are levels of infra-red that penetrate better than others. There would be tests before it was introduced for common use.