Free Space Optical Communications Free Space Optical Communications

Free Space Optical Communications


As the name suggests, Free Space Optical Communications (FSO) involves the transmission of data via ‘free space’, i.e. air, a vacuum or even outer space. FSO overcomes some of the inherent drawbacks of fiber or cable-based technology, such as inaccessibility, prohibitive costs or limited transmission distances. This technique is used in a wide range of fields, ranging from short range data communication for rotary encoders in industrial environments, to long distance ground to space satellite communications. 

The choice of both light source and detector is crucial for FSO and depends on several factors such as transmission distances, required data rates and wavelength of operation. Often in ground-to-ground free space optical communications, increasing the output power of a light source or laser to extend transmission range is often restricted by factors such as eye safety limits. In this case, highly sensitive detectors with inherent gain, such as APDs, SPADs or MPPC®s can be used to extend the communication range. Hamamatsu Photonics offer a wide portfolio of detectors and light sources, suitable for a range of FSO applications.  

Free Space Optical Communications (FSO)

Free Space Optical Communications (FSO)

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