Research On Mechanism And Mitigation Technology Of Atmosphere Effects In Laser Communications

In the field of atmospheric laser communication, Atmospheric attenuation of laser transmission intensity and the fluctuation problem have become the bottlenecks that limit its communication distance and performance. In order to increase the communication distance, rate, and improve the communication quality, it is very important to suppress the adverse effects of atmosphere on laser communication. The use of multiple caliber laser emitting and the use of larger caliber receiver lens are two primary means of suppressing atmospheric turbulence. In this paper, Laser transmission model in atmosphere channel is described and analyzed, which focuses on the impact of the light intensity fluctuation of the laser communication system performance. On this basis, we have established a model of the multi-caliber-launch and large-caliber-receive which is based on laser communication system parameters in atmospheric transmission channel. The simulation and analysis of the received light intensity and the flashing variance were completed, which were affected by the number of different launching caliber and the different size of receiving caliber. According to the analysis results, a multi-caliber-launch and large-caliber-receive test device was built. The multi-caliber-launch and large-caliber-receive inhibitory effect of atmospheric turbulence were validated by experiments. The test results and simulation analysis is consistent, which provides a theoretical and experimental basis for Multi-caliber-launch and large-caliber-receive applications in atmospheric laser communication research. According to the test results, some parameters of laser communication terminal of are optimized.