Research On The Accepting Technology Of Beacon Light Based On The Binary Optical Element In Inter-satellite Optical Communication System

Inter-satellite Optical Communications (IOC) is a method of high-speed datatransmission rate communication in which laser used as an information carrier betweensatellites. As communication technology toward to high-speed and large-capacity, IOCbecomes an important research direction of modern high-capacity spacecommunications. More and more countries have been launched research in this direction.Achieving the miniaturization and lightweight of optical communication terminal hasbeen a focus in IOC research. Moreover, the binary optical elements (BOE) haveovertook the advantages of small volume, light-weight and easy to copy, applying thistechnology to IOC system has gradually attracted much attention.In this dissertation, we chose the IOC beacon ray receiving system a s the researchobject, proposed the BOE could be an alternative of the traditional focus unit in thebeacon ray receiving system. Then a BOE for focusing beacon ray has been designedand has been evaluated the performance of this component according to the applicationindex of the acquisition and tracking system.Based on the scalar diffraction theory, we solved the phase function of focusingBOE by used the improved algorithm AA algorithm. And the phase function, whichhad been designed, did the simulation experiment to verify the performance. Then theinfluence of the small angle ray oblique incident on it has been analyzed. Thesimulation results of Matlab software showed the effectiveness of the algorithm.The focusing BOE design had been optimized by Zemax software with thecombination of the geometric ray tracing method, and phase function—achieved viamethod of scalar diffraction theory—used as initial value. Then the designed resultsand the processed parameters are given, and analyzed the diffe rent incident angleindicating to the optical performance of BOE. The results showed that this design cansatisfy the application environment of1°field.For the designed focusing BOE, the etching step number, etching depth error andstair width error had been simulated and analyzed the influence on elements’ outputlight field in this dissertation, which based on the polar coordinate laser direct writingprocess.The research work in this dissertation has the critical significance in thedevelopment of the IOC receiving optical system to miniaturization and lightweight.