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Adaptive optics testbed for pre- and post-compensation of earth-to-geo optical communication: Downlink results

: Leonhard, N.; Berlich, R.; Minardi, S.; Barth, A.; Reinlein, C.


Cugny, B. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
International Conference on Space Optics, ICSO 2016 : 18-21 October 2016, Biarritz, France
Bellingham, WA: SPIE, 2017 (Proceedings of SPIE 10562)
ISBN: 978-1-5106-1613-4
Paper 105623J, 5 S.
International Conference on Space Optics (ICSO) <2016, Biarritz>
Fraunhofer IOF ()

Optical communication between optical ground stations (OGS) and geostationary (GEO) satellites is a promising technology for future high-speed data transfer between Earth and space. However, such optical communication links suffer from distortions caused by atmospheric turbulence. To explore adaptive optics mitigation of this effect both in the uplink and the downlink beam, we have developed an adaptive optics testbed. In an earlier publication [1], we reported on the results of uplink compensation. In this contribution, we wish to elaborate more on the efficiency of downlink compensation. Further, we will highlight the differences between uplink and downlink compensation.