| Atmospheric laser communication is the new spots in Opticalcommunication. The characteristic of laser have the high strength and highcoherence. There are many advantages of large capacity, fast communication,narrow beam, secrecy in Free Optical communication. And laser is the idealcarrier in the system of FSO. Due to the random fluctuations of atmosphericrefractive index, the beam will be broadening and light will appear ups anddowns. The information of beam with be damaged and lost, when laserpropagation in the atmospheric turbulence after a certain distance. All of theseseriously affect the performance of laser communication. The more influencewhich include aerosol particles scattering and turbulent effect, happen betweenlaser beam and the molecules in the atmosphere. It increase the difficulty whichatmospheric laser communication system study of, the process of researchbecome slow down. Therefore, Transmission characteristics of laser beam in theatmosphere should be studied deeply. Greatly promote the development of thewireless laser communication.In this paper, the transmission characteristics and research status at homeand abroad of FSO are introduced, and the main function and working principleof main modules which include sending and receiving module, opticaltransmission module are analyzed, each circuit diagram and main componentsare designed and analyzed. Based on reflection theory of traditional long opticalpath and the advantages of White cell and Herriott cell, new long optical cell isdesigned.WDM of multi-channel optical signal is analyzed by the OPtiSystemsoftware. At the same time, FSO tester and Herriott pool are used to achieve forthe date transfer and the error rate testing the experiment. |
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