Research On Hingh-Efficiency And High-Speed Receiver Technology Of Atmospheric Laser Communication

The technology of laser communication was concerned by great nation in the world, because of its advantage of good security, building network conveniently, large communication capacity, smallness and portable, low power consumption and the other advantages. With the achievement of micro-arc order dynamic tracking technology, in order to develop its potentials and advantages further, high-rate and long distance became the new directions of the development of the laser communication.The technology of laser communication combined some more mature technologies of high speed optical fiber communication technology, such as front optical amplification, wavelength division multiplexing, diversity reception and the all-optical network technology, which also brought new problems into the air light coupled into optical fiber. Because of the effects of the deviation of the alignment, vibration and atmosphere, it was difficult to achieve high efficiency of air light coupled into optical fiber for tiny diameter of core of the fiber. Thus, big diameter of core of the fiber should be chosen. As the limit of the devices, the detective area of the detector of the high speed optoelectronic detector was difficult to achieve above 100μm. Therefore, it's necessary to optimize the diameter of fiber core and the detective area. At the same time, in order to lighten and lessen the optical platform and void some practical problems such as the high frequency interference and the moment of the wire-wound, it's necessary to estimate and solve the loss of optical docking to optimize the high efficiency and speed received system of the atmospheric laser communication.In the paper, the high-efficiency and high-speed receiver technology of atmospheric laser communication was analyzed, which was based on ideal and atmospheric condition. For which, the received system of the atmospheric laser communication and its main parameters were discussed and the effects of the atmospheric on the laser communication with high efficiency and velocity were analyzed. Besides, the factors were also discussed, which affected the space light coupling into the fiber and fiber docking coupling and the corresponding simulation results were given. The method was proposed, which was used to solve the problems of the atmospheric laser communication, and the results of the indoor fiber docking coupling were analyzed so that it was feasible and efficient. The experiment of the maximum coupling efficiency about the atmosphere was carried out and the effects of the atmospheric on the experimental results were discussed.