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在光纤延迟测向激光告警系统中,光纤延迟线是用来连接光学接收系统和光电转换系统的,起到传输光、延迟光、对光信号进行编码的作用。由于光纤延迟线的长度不同,光学窗口接收到的激光脉冲产生不同的时间延迟,从而实现激光方位信息到时间信息的转变。光纤延迟线的长度对激光告警器的体积、光学损耗、虚警率等因素有着直接的影响,在此利用激光脉冲的相关特性,通过最优化理论对光纤延迟线进行排列组合,提出了光纤延迟线长度编码的优化设计方法,通过对相关理论的分析与计算,得到了一个全向矩阵的排列方式,从而得出了相应的排列原则。按照该原则对光纤延迟线进行排列组合,从理论上得到了最优的光纤延迟线总长度值,为激光测向告警器的优化设计提供了重要的理论依据。
In the fiber delay-direction-finding laser warning system, the fiber delay line is used to connect the optical receiving system and the photoelectric conversion system, and plays the role of transmitting light, delaying light and encoding the optical signal. Due to the different lengths of the fiber delay lines, the laser pulses received by the optical window have different time delays, so as to realize the transformation of the laser orientation information to the time information. The length of the optical fiber delay line has a direct impact on the volume, optical loss and false alarm rate of the laser alarm. Based on the correlation characteristics of the laser pulses, the fiber delay lines are arranged and combined by the optimization theory, and the optical fiber delay Through the analysis and calculation of related theories, an arrangement of omni-directional matrix is obtained, and the corresponding arrangement principle is obtained. According to this principle, the optimal length of fiber delay line is theoretically obtained by arraying and combining the fiber delay lines, which provides an important theoretical basis for the optimal design of the laser direction finding alarm.