Wi-Fi Using Light Rays Can Make Browsing 100 Times Faster

In the present generation, usage of Wireless devices require more data and as a result the Wi-Fi network gets congested. Slow Wi-Fi is a source of irritation we all experience. Researchers at the Eindhoven University of technology in Netherlands have developed a Wi-Fi network based on directable harmless infrared light rays. The capacity is more than 40 Gbps for each ray and there is no need to share wavelengths since every device receives its own ray. The system does not require any power or moving parts since the data is transmitted by a few centralized antennas equipped with passive diffraction gratings and optical fiber to direct the rays. The device does not experience any interference from the neighbouring Wi-Fi network because each device is assigned different wavelengths by the same antenna.  This new device uses a safe infrared wavelength, which does not reach the retina of the eye, hence the technique is harmless.

The network traces the precise location of the wireless device using its radio signal transmitted in the return direction, if one moves away from the light antenna’s line of sight while using their smartphone or tablet another antenna takes over. Current Wi-Fi uses radio signals with a frequency of 2.5 or 5 Gigahertz. This new device uses infrared light with wavelengths of 1500 nanometers and higher. The harmless infrared light rays have much higher frequencies of 200 terahertz.

  -  Akhila Kakarala with inputs from: http://cacm.acm.org, https://www.tue.nl
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