基于不同滤波操作的自由空间光通信系统设计

Design of Free Space Optical Communication System Based on Different Filtering Operations

自由空间光通信凭借其通信速率高、容量大、无需频带许可等优势成为了一种重要的通信方式。为了提高自由空间光通信系统的性能,研究了自由空间光通信系统,运用OptiSystem仿真软件,对原自由空间光通信系统进行改进,在系统接收端分别加入不同滤波器(高斯、贝塞尔、法布里珀罗滤波器)后,对比分析在不同影响因素(传输范围和光束发散度)下改进后系统与原始系统的最大品质因数,得出改进后系统在各方面比原系统都表现出较好的传输性能。其中,在研究传输距离的影响时,使用高斯滤波器的系统比原系统品质因数高出约100;在研究光束发散度的影响时,使用贝塞尔滤波器的系统比原系统品质因数高出约100,由此实现了性能更加优化的光通信系统,为未来新型自由空间光通信系统的设计提供了新的思路。

Free Space Optical Communication(FSO)has been considered as an important communication strategies by virtue of its advantages of high communication rate,large capacity,and needless for frequency band license.This paper investigates the FSO system and uses OptiSystem simulation software to improve the original FSO system by adding different filters(Gaussian Filter,Bessel Filter,and Fabry-Perot Filter)to the receiving end of the system,and then contrasts and analyzes the maximum quality factor of the improved system with the original system under different influencing factors(transmission range and beam divergence).Finally,the improved system shows better transmission effect than the original system in all aspects.The quality factor of the system using Gaussian Filter is about 100 higher than the original system during the investigations of the influence of transmission range.The quality factor of the system using Bessel Filter is about 100 higher than the original system in the study of the influence of beam divergence,so as to realize a more optimized optical communication system.This method may provide a novel design route of free space optical communication system in the future.