Research On High-speed, High-sensitivity And Width Band Receiver Technology Of Atmospheric Laser Communication System

The technology of space laser communication was concerned by every nation in the world, because of its advantage of large communication capacity, low power consumption and the other advantages. The developing of low speed space laser communication was mature, as the key technology of high speed fiber communication applied to space laser communication, also the technology of high precision dynamic tracking develops further, the priority in laser communication researching diverts to high speed broadband communication.The size of high speed communication systems’detector decreased when the communication speed increased. The coupling efficiency of space light to detector decreased influenced by atmospheric turbulence, when the size of speckle greater than detectors’. The communication performance cannot be ensured.We analyzed the essential factors simply, which limit the performance of high speed laser communication, and in terms of theory, the affection of atmosphere-to-laser communication was analyzed in depth. Four receive plan of space light was raised base on these analyses, and we got the coupling efficiency by numerical simulation, which provided theoretical support for our following experience. By means of testing of indoor basic parameters and outdoor demonstrate experience, and the analyses before turned out to be reliable, which supplied theory and experience date support in further atmospheric laser communication experience.