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Transmission speed laser LiFi University of Edinburgh super 100G / sec

Are you still as Wi-Fi signal and the signal is weak uneven regional distribution annoyed it? Li-Fi could be the answer. This technology uses LED-based interior lighting instead of radio waves for data transmission. But Li-Fi has been a major supporter of the vision over in LED, with laser-based lighting to achieve Li-Fi, data transmission rate or an increase of 10 times.

Li-Fi data by adjusting the LED light output is encoded. The human eye can not perceive flicker rapidly, but the receiver or mobile device on a desktop computer can read the signals can even signal the return signal transceiver room ceiling, providing two-way communication. But many of the blue LED light into white light with a phosphor coating, which also limits the data transfer rate.

The study, published in Optics Express (Optics Express), Haas and his team research shows that replacing the existing LED lamp with a laser diode can significantly improve the current situation. High energy efficiency and light, lasers transmit data rate can be 10 times faster than the LED. Do not use phosphors, laser illumination can be mixed to produce white light of different wavelengths of light. This means that each wavelength of light can be used as a separate data channel, the same waves can be two-way transmission, can greatly improve the speed of light to transmit data, the University of Edinburgh team test the nine laser diodes.

Although Li-Fi-based LED can reach 10 Gb / s data transfer rate, the upper limit of the data transfer rate can be improved Wi-fi7 Gb / s for. Laser transmission data rate can easily exceed the 100 Gb / s.

At present, this device is still very expensive, large-scale production of Edinburgh University is seeking to reduce its costs, and can apply it to the lighting market. BMW i8 headlights is based on the laser light.


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