Optical Data Link
Introduction to the Optical Data Link
Interview with DLR on the Optical Data Link
The Hi-SIDE optical data link is a third-generation system developed within the OSIRIS (Optical Space Infrared Downlink System) programme. OSIRIS aims to develop experimental free space optical (FSO) communication systems optimized for small satellites.
Developed by DLR in cooperation with TESAT, the Hi-SIDE optical terminal system supports data link rates of up to 8 Gbit/s with optical downlink rates of 10 Gbit/s. Furthermore, the system is compatible with the SpaceFibre standard and is a reference design for the emerging O3K CCSDS standard for optical downlinks.
This is the first implementation of a 10 Gbit/s laser communication terminal for LEO to ground data transmission. The system counts with a coarse pointing assembly (CPA) and features high precision closed loop pointing and tracking algorithms. Moreover, it is a reference design for the upcoming CCSDS standard for FSO communications. The main advantages of this technology are:
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tap-proof data transmission
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license free operation
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potential for very high data throughput applications
Performance:
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Data link data rate, 8Gbps
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Scalable using dense wave division multiplexing (DWDM)
Applications:
The optical downlink will have applications in high throughput, data transmission for scientific, earth observation and telecom satellites. This system will provide a viable alternative the overburdened radio frequency technology and addresses increasing demand for FSO technology in 3G and 4G network architectures.
OSIRIS Terminal