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Mark.JUK writes "German scientists working at Berlin's Fraunhofer Institute for Telecommunications have set a new world record for Visible Light Communication (VLC) technology after they succeeded in using regular red, blue, green and white LED (Light-Emitting Diode) light bulbs as the basis for building a new 800Mbps (Megabits per second) capable ultrafast Wireless Local Area Network (WLAN). Dr. Anagnostis Paraskevopoulos explained: "With the aid of a special component, the modulator, we turn the LEDs off and on in very rapid succession and transfer the information as ones and zeros. The modulation of the light is imperceptible to the human eye. A simple photo diode on the laptop acts as a receiver. The diode catches the light, electronics decode the information and translate it into electrical impulses, meaning the language of the computer."
The solution, which could be installed on ceilings and would cover approximately 10 square meters, would be ideal for HD video streaming and inside Hospitals or Aircraft where traditional Wi-Fi is often banned. However visible light signals can easily be blocked, such as when a hand is passed in front of the transmitter." Link to Original Source
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