Abstract
Two coherent optical transmission systems, both transmitting 565 Mbit/s at 1064 nm are presented. These systems have been designed for experimental studies in the laboratory and in a stationary free space optical link. The aim is to demonstrate the suitability of such high-bitrate coherent optical data transmission schemes for future space applications. The prototype breadboard system uses PSK modulation with homodyne reception. A new synchronization technique made it feasible to build up a low-complexity receiver allowing a power efficient transmission 3.5 dB above the shot noise limit. The second system is a compact and robust DPSK system with heterodyne detection. This system is embedded in a new stationary test facility, which shall allow free space communication experiments between two buildings (760 m).
Dr. Franz is now professor for Optical Communication at the Polytechnical University Düsseldorf
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© 1992 Springer-Verlag
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Franz, J., Rapp, C., Wandernoth, B. (1992). DLR experimental systems for free space optical communications. In: Hagenauer, J. (eds) Advanced Methods for Satellite and Deep Space Communications. Lecture Notes in Control and Information Sciences, vol 182. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0036055
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DOI: https://doi.org/10.1007/BFb0036055
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