By BizLED Bureau
Nov 15, 2017: Li-Fi technology that uses LED lighting instead of radio waves to transmit data, will now use laser-based lighting, that will transmit data rate ten times faster.
Laser-based Li-Fi will have better light output than LED. The project is being conducted by Harald Haas, chairman of mobile communications at the University of Edinburgh. He is also a member of the Ultra-Parallel Visible Light Communications Project. Haas said that he believed that the next wave of energy efficient lighting will be laser diodes.
Li-Fi encodes data on the light emitted by LEDs. The rapid flickering cannot be seen by human eye, but a computer receiver or a mobile device can read the signal, and then send back to a transceiver, providing two-way communication. But many LEDs use phosphor coating to convert blue light to white, which limits the speed of the device for modulation.
In the research Haas and his team showed that by replacing LEDs with laser diodes the speed can be improved drastically. Lasers that have high energy and optical efficiency can be modulated at 10 times faster than LEDs. As LEDs use phosphors to give white light, laser lighting will create white light by mixing the output of several lasers operating at different wavelengths. Each wavelength can be used as a separate data channel. These wavelengths let optical telecommunications carry a lot of data.
While LED-based Li-Fi could reach data rates of 10 Gb/s, an improvement over the 7 Gb/s maximum of Wi-Fi, using lasers could boost that speed to ?easily beyond 100 Gb/s.
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