Physicists Send Information Using Twisted Light Over Vienna
For the first time ever, physicists have used twisted light in a laser beam to send information outside across a distance of 1 point 86 miles.
Physicists have used a twisted laser light to beam information to a point 1 point 86 miles away, the longest distance outdoors to-date.
Using a technique known as orbital angular momentum, the University of Vienna researchers beamed the images of three famous Austrians across their city.
Black and white portraits of the composer Wolfgang Amadeus Mozart, along with the physicists Ludwig Boltzmann and Erwin Schrödinger were transmitted using a corkscrew-like beam of light.
The green laser beam with the digitized images was sent across the record distance from a radar tower to a receiver with a camera and computer that decoded them with a 1 point 7 percent error rate.
The pictures each took a few minutes to be re-created because each pixel was sent individually.
Jonathan Leach, from Heriot-Watt University in Edinburgh is quoted as saying: "It's a huge technological achievement. It's really amazing that they were able to transmit these quite faithful images across what's quite a long free-space distance."
This same technology might be used in the future to communicate with satellites through Earth’s atmosphere, which is about 3 point 78 miles thick.
Since there is no maximum number of twists in each photon, the potential amount of information that can be used with this method might be endless.
Physicists have used a twisted laser light to beam information to a point 1 point 86 miles away, the longest distance outdoors to-date.
Using a technique known as orbital angular momentum, the University of Vienna researchers beamed the images of three famous Austrians across their city.
Black and white portraits of the composer Wolfgang Amadeus Mozart, along with the physicists Ludwig Boltzmann and Erwin Schrödinger were transmitted using a corkscrew-like beam of light.
The green laser beam with the digitized images was sent across the record distance from a radar tower to a receiver with a camera and computer that decoded them with a 1 point 7 percent error rate.
The pictures each took a few minutes to be re-created because each pixel was sent individually.
Jonathan Leach, from Heriot-Watt University in Edinburgh is quoted as saying: "It's a huge technological achievement. It's really amazing that they were able to transmit these quite faithful images across what's quite a long free-space distance."
This same technology might be used in the future to communicate with satellites through Earth’s atmosphere, which is about 3 point 78 miles thick.
Since there is no maximum number of twists in each photon, the potential amount of information that can be used with this method might be endless.
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