Researchers at the Fraunhofer Heinrich Hertz Institute in Berlin have developed a new optical wireless technology that doesn't need a traditional radio-based router. Instead, the digital data is transmitted via light.
The researchers developed a special modulator to regulate the LED light source, and a photodiode captures the light on the laptop. The new technology is especially promising for settings where radio wireless is undesirable, or where it can't reach - including places like offices, hospitals and aircraft cabins. Another benefit is security. Because every wall or opaque surface acts as a firewall, optical wireless technology is almost impossible to wiretap.