Researchers from the Aston Institute of Photonic Technology and the University of Glasgow have developed algorithms
FSO wireless communication technology transmits data in the form of light through the ambient air/ It can be used to create low-cost telecommunications or computer networks, as FSO does not requireBut because the data is sent in the form of pulses of light, weather conditions canA bright sunny day or thick fog can refract or distort the beam of light, creating turbulence that leads toto data loss.
An eight-beam laser transceiver for FSO communicationImage: Adamantios, CC BY-SA 3.0, via Wikimedia Commons
To overcome this problem, researcherssimultaneously transmitted several data signals using light beams of different spatial shapes. Atmospheric turbulence changes the shape of the rays, leading to signal loss, the scientists explain. But if you transmit several signals of different shapes, more light is collected in the receiver, and the original data can be decoded using a special algorithm.
The researchers conducted a series of experiments withatmospheric noise simulation using commercially available selective mode photonic flashlights, a commercial transponder, and a turbulence emulator based on a spatial light modulator. They managed to create an air optical channel using five spatial modes and achieve a record data transfer rate of 689.23 Gb / s.
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