New Results From the 2021 FEEDELIO Experiment - a Focus on Reciprocity

The FEEDELIO experiment aims at demonstrating adaptive optics capability to mitigate the atmospheric turbulence channel disturbances in a GEO-Feeder relevant environment. In addition to the bi-directional data acquired in presence of anisoplanatism, this measurement campaign was an opportunity to assess the optical quality of the bench and to improve calibration procedures. To this end, we conducted a reciprocity experiment. We measured a channel reciprocity up to 95% and identified, through numerical simulations, that residual non common path aberrations were the primary source limiting the effective reciprocity.