Near-Atmosphere Atmospheric Laser Communication System Design

Near-field laser communication technology has become the current research hotspot,both at home and abroad have carried out in-depth study of this technology.Atmospheric laser communication is a laser as a carrier,through the atmosphere of the means of wireless communication.It is easy to use,the cost is about 1/5 of the optical fiber communication,can be relatively free from the weather conditions.Influence;can be a separate network,can also be used as a supplement to optical fiber communication.This paper studies the influence of atmospheric channels on the communication of laser communication systems.The signal deterioration caused by conditions such as atmospheric absorption,scattering,and atmospheric turbulence has been analyzed,and a theoretical derivation has been made.According to the theoretical derivation results,the VPI software is used to build the simulation system.At the same time,we design the launch module and the atmospheric turbulence module.Finally,the system is simulated and the eye diagram and waveform diagram of the system are given.Based on the results of VPI simulation,we designed and built an actual atmospheric laser communication system.At the same time,we provided a practical channel coding system design.Finally,an 8km field test was conducted using the built communication system.The experimental results verify the correctness of the results of the simulation analysis and theoretical derivation.