1. Optical link architecture
1.1 General description
Communication takes place either between two terminals located on two different satellites or, exceptionally, between a satellite and a ground receiving station (links with distant probes, for example). Let's consider the case of an intersatellite link (LEO-GEO, LEO-LEO or GEO-GEO). Figure 2 shows a schematic diagram.
LEO: low earth orbiting; GEO: geostationary earth orbiting
The signal to be transmitted is obtained in the form of an electric current modulated either directly by a semiconductor laser (associated with direct power detection), or indirectly, by...
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Center national d'études spatiales CNES
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