Researchers at Oxford University is currently developing a wireless network technology called "Li-Fi", which is capable of speeds of 100Gbps data transmission, which makes it a strong contender for Wi-Fi technology.
The current use of an optical fiber network has a data transfer. Optical fiber using total internal reflection principle, internal guidelines in the transmission direction of light, so there is no loss of data. Li-Fi and then let the light through the air, in this way, no guidelines passage of light, so the technical difficulty to be larger.
Researchers create a need to be installed on the ceiling of the base station, its function is to transmit and receive optical signals from the computer. The transmitter and receiver means are equipped with a holographic beam control technology, to create a programmable diffraction grating, used to control the direction of the light directed to the need to use liquid crystal array.
This technique is effective distance of 3 meters, but requires holding means and the computer "direct vision", that is, the computer needs to be placed between a fixed position, and the apparatus can not have any shelter.
In addition, the file transfer speed of the system is not stable, it will be affected by vision. The more open vision of the base station, transmission faster. If the vision is limited, and that rate will decline.
The researchers said that their next goal is to develop a tracking system that allows users to freely display and move their computer, and the data transfer will not be affected.
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