调制回复反射器(modulating retro-reflector,MRR)制约非对称自由空间光通信系统的性能.本文建立高斯光束经角偶棱镜(corner cube retro-reflector,CCR)的MRR反射后出射光束的数学模型,分析大气湍流对调制回复反射器光链路的影响,研究CCR多光束反射特性对大气湍流信道的补偿作用.仿真结果表明,在传输距离、光功率、反射面积一定的条件下,波长、入射角及CCR折射率都是影响链路性能的关键因素,CCR反射后的多光束效果也可有效降低接收信噪比的起伏.
Performance of asymmetrical free space optics(FSO) depends on retro-reflector.In this paper, a mathematic model of laser beam reflected by corner cube retro-reflector(CCR) is set up and applied to analyze the effect of atmosphere turbulence on the modulating retro-reflector(MRR) link.Further,channel compensation of CCR reflection characteristics for the received power fluctuation induced by atmospheric turbulence is discussed.Simulation results show that wavelength,angle of incidence,and refractive index of CCR are the key factors influencing performances of the asymmetrical link,and SNR fluctuation is decreased by reflection of CCR.