Twisted Light Beams Used to Transmit Data Across Vienna

Twisted Light Beams Used to Transmit Data Across Vienna | In Compliance Magazine

University of Vienna scientists used light beams configured in 16 different patterns that corresponded with binary numbers to test a new method of transmitting data.  The scientists used Orbital Angular Momentum of light (OAM) to twist the green laser into a corkscrew shape to increase the amount of potential communication channels. This was the first time OAM was used for long distance open-air data transmission.

A green laser was mounted on top of a radio tower at the Central Institute of Meteorology and Geodynamics and directed at a receiver at the University of Vienna. Sixteen different patterns were used to encode grey-scale images of Wolfgang-Amadeus Mozart, Ludwig Boltzmann, and Erwin Schrödinger across the Vienna. At the University of Vienna, a camera detected the beam and used an artificial neural network; the atmospheric interference was filtered out to reveal the transmitted images. This new method of transmitting data could be applicable in satellite and open air applications.

Read more about using twisted light beams to transmit data. 

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