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

The Olympic record of intelligent network, you still Wi-Fi signal of uneven regional distribution and the weak signal to feel annoyed? Li-Fi may be the answer. The use of LED lighting instead of radio data transmission based on this technology. But the main supporter of Li-Fi vision has over LED, with laser light Li-Fi based on the realization of 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 based on laser diode."

Li-Fi encoding by adjusting the LED light output data. 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 led phosphor coating the blue light into white light, it also limits the rate of data transmission.

The study is published in optics (Optics Express), Haas and his team showed that the replacement of laser diodes for existing LED lamps can greatly improve the situation. High energy laser and optical efficiency, data transmission rate can be 10 times faster than LED. Do not use fluorescent powder, laser illumination can mix 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 data transmission rate of LED based on Li-Fi can reach 10 Gb/s, the data transmission rate cap can improve the Wi-fi7 of Gb/s. The rate of laser transmission data can easily exceed 100 Gb/s.

At present, this device is still very expensive, University of Edinburgh is seeking to reduce the cost of mass production, and can apply it to the lighting market. BMW I8 headlamps is based on the laser light.

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