Novel techniques for free-space optical communication at high data transfer rates are of interest for future military application. Retrocommunication provides a technique to transfer data from small platforms using an asymmetric data link. Retrocommunication has been a sub-project within the Swedish Defence Photonics project and this report contains a summary of the main results obtained within the project. The novel technologies studied were multiple quantum well (MQW) optical modulators for communication and spatial light modulators (SLMs) based on liquid crystal materials for non-mechanical beam steering. Within the project reflective MQW modulators with high contrast and capable of high data rates have been developed. Non-mechanical beam steering techniques were evaluated experimentally and by developing performance models. A retroreceiver based on MQW modulators and a transceiver using non-mechanical beam steering were developed and fabricated. In the final phase of the project a retrocommunication link using MQW modulators and non-mechanical beam steering was demonstrated. Link establishment and tracking of the movable retroreceiver during data transfer were shown. The link was in real time capable of transferring audio signals and images captured by a CCD camera.