Lange, Robert; Heine, Frank; Kämpfner, Hartmut (Tesat-Spacecom, Gerberstr. 49, 71522 Backnang, Germany)
Meyer, Rolf (DLR, German Aerospace Center, Königswintererstr. 522-524, 53277 Bonn, Germany)
5.625 Gbps optical communication link based on homodyne BPSK is under in-orbit verification. Within the near future optical data relay systems will be established with a maximum user data rate of 1.8 Gbps.