New Scientist - Commonly available laser pointers can zing data through the air across a room twice as fast as most USB cables or Wi-Fi routers. The new optical wireless promises to be cheap and easy to roll out in hospitals and other places where radio transmitters cannot be used.
Engineers at the National Taipei University of Technology in Taiwan picked red and green laser pointers because they are cheap and easy to get hold of. The hardware used in a demonstration cost only about $600, says Hai-Han Lu, who led the work. Combining the two signals yielded a billion bits per second, double the data rates of USB 2.0 or high-speed radio-based Wi-Fi.
Fog, rain and snow make long-distance laser links through air impractical, but they could work for indoor use. A system along these lines could one day be useful for high-speed connections between smartphones.If you liked this article, please give it a quick review on ycombinator or StumbleUpon. Thanks