中文摘要：

在现有的水下回射光通信链路研究中，没有考虑调制回复反射器对链路性能产生的影响，为解决上述问题，引入高斯光束经角偶棱镜的调制回复反射器反射后出射光束的数学模型，建立了水下调制回复反射光通信系统的上、下行链路模型。根据上述模型，研究了回复反射器的材质折射率以及光入射角对调制回复反射光通信链路性能，即接收机接收的光子数和链路误码率的影响。仿真结果表明，回复反射器材质折射率、光入射角均对通信链路性能有一定影响，并且光入射角对链路性能的影响更加明显，可为水下网络通信研究提供参考依据。

英文摘要：

In this paper, a mathematic model of a beam reflected by the comer cube was introduced and applied to established uplink and downlink models of underwater modulating retro-reflector optical communications. Based on these models, we carried out the research on effect to the performance of retro-reflector link received photon number and BER caused by material refractive index of comer cube and the incidence angle. Finally, the simulation shows that material refractive index and the incidence angle have a vital effect to optical communication link performance, moreover, the incidence angle＇s effect is more obvious, which has a certain reference value to the study on underwater network communication.