Research On The Adaptability Of Optical Fiber Transmission System In The Space Radiation Environment

Optical fiber communication was considered to be the most potential application for space communication because of its high bandwidth, resistance to electromagnetic interference, light weight, small size and so on. This became a new domain. Optical fiber communication has high data and information transmission rates, so it is suitable for intra-satellite, inter-satellite, satellites and space shuttles application. Now each country has focus on space application with optical communication.However, space environment is very complex. It is necessary to analyze the space applicability of the components and the entire system if we use the technology which is used on ground, and make sure the system run with high reliability and low-risk. According to the demand for space application with optical fiber communication, this paper accomplishes theoretic analysis on photoelectric components applying to radiation environment, and then made simulation based on the entire system under different radiation condition.The development of space communications is analyzed at the first of this paper. We discuss the importance of adaptability in space application and introduce some examples of each country. The space radiation environment is described. The radiation effect on photoelectric devices are analyzed, especially the component which are used for optical fiber transmission system. The capability change about the system at different radiation condition was obtained through the simulation. It points out that system performance change greatly at high dose (＞60Krad). Different components have different effect to system under the same radiation condition through the simulation. It points out that the degeneration of EDFA has a significant impact on system compared to other components. At last, the optical fiber communication for space application is evaluated, and the testing methods of the system are proposed.Through the study in this paper, we master the radiation effect on photoelectric components and the entire system. It is a useful exploration and provides the basic ideas and references for space application with optical fiber communication.