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High-speed optical communication Li-Fi

15.06.2013

Li-Fi, short for Light Fidelity, is an optical wireless technology developed and presented by Harald Haas at the 2011 TED Talk. The French company Oledcomm announced that the first communication devices of its production, based on Li-Fi technology, will be available on the market next year.

Li-Fi technology works by binary modulating light from a special LED source. Modulation is carried out at a high frequency, and the transceiver itself in appearance is no different from an ordinary LED light bulb for household lighting.

Receiving sensors connected to computers or other digital electronic devices allow you to receive information when they are exposed to direct light from a Li-Fi source. This imposes some restrictions on the use of this technology, but in the end, such optical communication is somewhat safer than traditional Wi-Fi, the signals of which can be intercepted from anywhere within the range of the equipment. In order to intercept information transmitted via Li-Fi, an attacker will need to place his spy equipment literally on your lap, which can lead to serious difficulties for him.

In addition to the above, Li-Fi optical wireless technology can be used without restriction in places where the use of equipment that emits extraneous radio waves that may interfere with the normal operation of critical equipment is prohibited. Such places, of course, include intensive care wards of medical institutions, aircraft cabins and some other places.

At present, the information transfer rate that Li-Fi technology can provide is slightly higher than the speed of traditional Wi-Fi. Oledcomm representatives report that they have managed to obtain a stable information transfer rate of about 3 Gb / s, and a transfer rate of 10 Gb / s will be achieved in the very near future.

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