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Abstract-Over the past years we have successfully applied adaptive optics (AO) in some optical ground stations (OGS) to improve the signal-to-noise ratio of satellite to ground laser communications. In the paper we present the realized setups including optics and components, the reconstruction scheme especially latest performance measurements of the AO system implemented at the 26cm TAOGS optical terminal which is presently at the Observatorio del Teide, Tenerife. Furthermore, we present the concept for the upgrade of ESA's OGS (1 m telescope) with an AO system for satellite-to-ground links. The system is suited to be operated with coherent laser communication systems at 1064nm. However, the upgraded ESA OGS can also be operated with laser light in the 1550nm range. The wavefront sensor is a Shack-Hartmann-sensor (21 sub-apertures across the pupil), matched to a 22x22 actuator deformable mirror (DM). Due to a special high speed infrared camera, the control loop can run at speeds of typically 4-7 kHz, depending on the received laser power.

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