自由空间光通信光学天线系统设计

Design of optical antenna system for free space optical communication

文章专注于光学天线发射系统的理论研究与实际设计,通过缩放法来计算光学系统的初始结构。选择卡塞格伦系统作为研究对象,该系统由一个抛物面主镜和一个双曲面副镜构成。通过使用Zemax软件进行模拟,文章构建了一款卡塞格伦发射系统,其特点为体积小型化且像质优良。通过对系统结构进行优化,使得光斑弥散值为2.157μm,波前差为0.0166个波长,像质优良。模拟结果显示,该系统在5 km的距离上,发射功率可达174 MW,发射效率达到了87%。文章不仅提供了一种有效的光学天线设计方法,还对光学天线的实际应用有一定的指导意义。

This study focuses on the theoretical research and practical design of optical antenna transmission systems,and calculates the initial structure of the optical system using the scaling method.The Cassegrain system is selected as the research object,which consists of a parabolic primary mirror and a hyperbolic secondary mirror.By using Zemax software for simulation,a Cassegrain transmission system is constructed,which is characterized by small size and excellent image quality.By optimizing the system structure,the spot size is 2.157μm and the wavefront error is 0.0166 wavelengths,resulting in excellent image quality.The simulative results show that the system can achieve a transmission power of 174 mW and a transmission efficiency of 87%at a distance of 5 kilometers.This study not only provides an effective optical antenna design method,but also has certain guiding significance for the practical application of optical antennas.