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ATP(the acquisition,tracking and pointing;自动捕获,跟踪和瞄准)技术是无线光通信、光学雷达探测等领域中的关键技术。进一步的提高其精度已十分困难,而且会造成设备的重量和成本的大幅提高。利用传播方向相反的相位共轭波具有自追迹的特性,可以克服大气信道对光波的随机扰动。利用光纤制作的器件具有小体积、小重量而且三阶非线性效应强的优点,可以制作空间光通信系统中的光学器件。本文采用共轭波的自追迹现象设计了一种可以进行高精度实时跟踪的光纤器件APT子系统,并测试了该系统的通信性能。
ATP (the acquisition, tracking and pointing) technology is a key technology in the fields of wireless optical communication, optical radar detection and the like. Further improving its accuracy has been very difficult, and will result in a substantial increase in equipment weight and cost. The use of the phase conjugate wave with the opposite propagation direction has the characteristics of self-tracing, which can overcome the random disturbance of light waves in the atmospheric channel. The advantages of the device made by using optical fiber are small volume, small weight and strong third-order nonlinearity, so that optical devices in a space optical communication system can be manufactured. In this paper, a self-tracking phenomenon of conjugate wave is used to design an APT subsystem for optical fiber devices that can track with high accuracy and real-time, and the communication performance of the system is tested.