The Polarization Of Coherentlaser Communication System Performance Impact Analysis And Compencation Technology

Space optical communication technology is a new communication technology to solve the bandwidth limitation of microwave communication and to realize high speed communication. In the space optical communication, the coherent optical communication technology has the advantages of high speed, high sensitivity and so on. However, the coherent optical communication technology is required to match the characteristics of the parameters of the signal and the local oscillator. In coherent optical communication system, the polarization characteristics of the signal light and the polarization is not consistent, which will change the polarization state of the optical signal, which will affect the efficiency of the coherent communication system.The polarization state of the signal light in the space optical communication link to change and how to match with loss of optical signal and local oscillator light polarization compensation there is no clear and complete solution. The through theory and Simulation of signal light passes through the optical transmitter and receiver optical structure and atmosphere, the change of polarization state analysis, analysis of the signal light in no turbulence after atmospheric polarization changes, and analyzes the optical signal and local oscillator light polarization state loss effect of paired mixing efficiency is pointed out necessity of polarization control. Through the study of polarization controller. Finally, a for space optical communication of polarization compensation method.