基于光纤传输的激光引信仿真系统

激光引信是制导武器普遍使用的近炸引信，然而要在实验室内获得接收机窗口处的光信号功率并验证信号处理系统的准确性是比较困难的。针对这一问题，提出一种基于光纤传输的激光引信仿真系统。此系统首先通过耦合透镜和自聚焦透镜将发射机输出的激光束耦合进入光纤通道，然后通过程序控制的宽带光强衰减器实时地模拟光束经过目标反射引起的光强衰减，最后将衰减后的光信号通过光纤传输并经过耦合透镜馈入引信的接收机窗口。该系统的设计能够较为准确地模拟激光引信在交会过程中的回波光功率大小，并可实时地仿真激光引信各通道的回波信号，从而可以在实验室内验证激光引信信号处理系统的可靠性。

Optical fiber-based simulation system for laser fuze

Laser fuze is a kind of proximity fuze generally used in guided weapon. However, it is very difficult to obtain the intensity of reflected laser pulses at the receiver's windows in the laboratory. In addition, testifying the signal processing algorithm in the laboratory is another problem. A method of optical fiber-based simulation system is proposed here for laser fuze. Firstly, coupling lens and auto-focus lens are used in this system to couple the laser beam transmitted from (emitter) into fiber. Then, real-time power attenuation simulation is realized by means of a program-controlled wideband intensity attenuator. After being attenuated, the optical signals returned to windows of receiver through coupling lens by fiber optic propagation. In the system , the fiber is used to propagate laser pulses, so it can accurately simulate the reflective laser signalwhich laser fuze has transmitted such as passing across the target. At the same time, it can testify the signal processing algorithm used in laser fuze in the laboratory through controlling attenuation of laser signal in real-time. By theoretical analysis, system composition and detailed design of every part are proposed, then the design is verified by conclusion.