Equipment Research On Fully Opticalacquisition In Laser Communication On Ground

The sight-axis alignment can be accomplished by the fast acquisition operation between two laser communication terminals, which is the premise of establishing a free-space optical communication link. Especially for the near earth surface laser communication, due to occlusion and other reasons, these would break the transmission of laser and break the communication as well. This requires the communication terminals have to capture each other in a fast, efficient and stable way. So the fully optical acquisition technique is one of technologies in space laser communication.Under the near earth surface laser communication of army battlefield environment(electromagnetic interference or radio communication interruption), his paper presents a new idea, which is scheme of fully optical laser communication acquisition based on scanning in one-dimensional of azimuth and scheme based on image recognition and prediction; Firstly,on the basis of the analysis of the traditional capturing methods, the paper analyzed this new idea of fully optical acquisition and established the capturing algorithm models, such as,scanning model and failure probability mode, the power model of the acquisition link. And the optimization analysis between the parameters of the capturing unit and capturing time has been carried out using the software of MATLAB. The scheme is introduce in detail which is capturing about image recognition and prediction; Secondly, according to the theoretical analysis, an experimental system of fully optical acquisition have been designed and built.Through the theoretical calculations and experiments can verify the feasibility of the new ideas. The method proposed by this paper is very important for using the laser communication terminals.