At the end of May this year, scientists realized data transmission at a speed of 100 Mbit / s, and there was no information loss. The experimental object was a ceiling LED that could illuminate an area of ​​more than 10 square meters. The receiver can be placed anywhere in this area. Anagnostis Paraskevopoulos of the Heinrich Hertz Institute said: "This means that we transfer four HD videos simultaneously to four different laptops."
Scientists are studying higher bit rates. Klaus Dieter Lange said, "With red-blue-green-white LEDs, we are able to achieve 800 Mbit/s in the lab. This is a world record for visible light communication (VLC) methods. â€
This technology can be used where radio transmission is not allowed. For example, using optical communication in the operating room can achieve high-speed and complete data transmission, it is possible to control wireless surgical robots, or to transmit X-ray images; for example, this technology is used on aircraft, and each passenger can Watching their entertainment on the display saves miles of cable; in addition, this technology can be used on production equipment to avoid interference from radio transmission to industrial production.
Scientists emphasize that VLC is not intended to replace the usual WLAN, PowerLAN, or UMTS. It is best suited as a data transmission alternative for occasions where it is undesirable or impossible to use a radio transmission network and does not require new cables or equipment. Combinations are also possible, such as using optical WLAN in the transmit channel and using PowerLAN in the return channel.
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