To reduce the effect of atmospheric turbulence and stabilize the optical link in free-space optical (FSO) communications, we have proposed to use an optical duplicate system (ODS) as a multi-beam generator. In this paper, a transmitter adopting the ODS is designed and constructed for the experiment. Moreover, the experiment is conducted to transmit multi-beam generated by the ODS between two points on the ground at a distance of about 450 m. In this experiment, it is found that when the number of multi-beam generated by the ODS is increased from one to two, the width of the probability density distribution of the light intensity calculated from the movies captured by the receiver becomes narrower, and the variation of the light intensity becomes smaller. It is experimentally demonstrated that the effect of atmospheric turbulence can be reduced by the ODS. These results indicate that the ODS will make a significant contribution to the stabilization of optical link in FSO communications.

为了减少大气湍流的影响并稳定自由空间光 (FSO) 通信中的光链路，我们建议使用光学复制系统 (ODS) 作为多波束发生器。本文设计并搭建了一个采用ODS的发射机进行实验。此外，还进行了实验，以在距离约 450 m 的地面两点之间传输 ODS 产生的多波束。在本实验中发现，当ODS产生的多光束数从1条增加到2条时，接收器拍摄的电影计算出的光强概率密度分布宽度变窄，光强度的变化变小。实验证明，ODS 可以减少大气湍流的影响。这些结果表明，ODS 将对稳定 FSO 通信中的光链路做出重大贡献。