An optical antenna for a duplex link formed by a transmit, Tx, beam towards a partner optical antenna and a receive, Rx, beam from the partner antenna, the optical antenna comprising: a proximal optical path including a bidirectional waveguide for a duplex propagation of the duplex link from at least one Tx source of the Tx beam and towards at least one receiver of the Rx beam ; a distal duplex optical path (40") for a duplex propagation of the duplex link from and towards the partner optical antenna; a beam shaper positioned in the distal optical path (40") to shape Z a duplex propagation pattern of the duplex link ; and a controller to control the beam shaper to adaptively shape the duplex propagation pattern to enclose: a first partner antenna position of the partner antenna at the instant of transmission of the Rx beam ; and a second antenna position of the partner antenna at the instant of reception of the Tx beam , characterized in that the controller is further configured to control the beam shaper to adaptively shape the duplex propagation pattern between: a first pattern ; and a second pattern different from the first pattern , wherein the controller is further configured to control the beam shaper to modify the duplex propagation pattern from the first pattern to the second pattern and/or vice versa on the basis of criteria on status of the optical antenna and/or the partner optical antenna. a proximal optical path including a bidirectional waveguide for a duplex propagation of the duplex link from at least one Tx source of the Tx beam and towards at least one receiver of the Rx beam ; a distal duplex optical path (40") for a duplex propagation of the duplex link from and towards the partner optical antenna; a beam shaper positioned in the distal optical path (40") to shape Z a duplex propagation pattern of the duplex link ; and a controller to control the beam shaper to adaptively shape the duplex propagation pattern to enclose: a first partner antenna position of the partner antenna at the instant of transmission of the Rx beam ; and a second antenna position of the partner antenna at the instant of reception of the Tx beam , a first partner antenna position of the partner antenna at the instant of transmission of the Rx beam ; and a second antenna position of the partner antenna at the instant of reception of the Tx beam , characterized in that the controller is further configured to control the beam shaper to adaptively shape the duplex propagation pattern between: a first pattern ; and a second pattern different from the first pattern , wherein the controller is further configured to control the beam shaper to modify the duplex propagation pattern from the first pattern to the second pattern and/or vice versa on the basis of criteria on status of the optical antenna and/or the partner optical antenna. a first pattern ; and a second pattern different from the first pattern , wherein the controller is further configured to control the beam shaper to modify the duplex propagation pattern from the first pattern to the second pattern and/or vice versa on the basis of criteria on status of the optical antenna and/or the partner optical antenna. <EOS>