Don't worry about speed! Laser LiFi transmission can exceed 100G per second

Arcane intelligence network news, you are still uneven distribution of the Wi-Fi signal and weak signal annoyed? Li-Fi may be the answer. This technology uses LED based indoor lighting instead of radio wave data transmission. But the main supporters of Li-Fi's vision has exceeded LED, using laser illumination to achieve Li-Fi, data transmission rate or increase 10 times. Harald Haas, the chair of mobile communication in University of Edinburgh and member of the Ultra-Parallel visible light communication project said: "the problem is the LED lamp, although their energy efficiency than incandescent lamp is still high, but also can improve the light output efficiency of them," said Gerald Haas of the University of Edinburgh. "We believe that the next wave of energy-efficient lighting will be based on laser diodes. "

Li-Fi encodes data by adjusting the output of the LED light. The human eye can not perceive fast flash, but on a desktop computer or mobile device can read the receiver signal, the signal can even return signal transceiver room ceiling, providing two-way communication. But many LEDs use a phosphor coating to convert blue light to white light, which limits the speed of data transfer.

The study, published in Express (Optics), Haas and his team showed that replacing existing LED lamps with a laser diode can greatly improve the situation. High energy laser and optical efficiency, the speed of data transmission can be 10 times faster than LED. Do not use fluorescent powder, laser light can be mixed with different wavelengths of light to produce white light. This means that each wavelength of light can be used as a separate data channel, the same wavelength two-way transmission, can greatly improve the optical transmission data rate, the test team at the University of Edinburgh with 9 laser diode.

Although the LED based Li-Fi can achieve a data rate of 10 Gb/s, it can improve the upper bound of the data transmission rate of Wi-fi7 Gb/s. Laser transmission data rate can easily exceed 100 Gb/s.

Currently, the device is still very expensive, University of Edinburgh is seeking large-scale production to reduce its cost, and it can be applied to the lighting market. BMW I8 headlamps are based on the laser light.

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