光纤延迟线长度编码优化设计

Optimization design of the length encoder of optical fiber delay lines

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 optical fiber delay directional detection laser warning system, the optical fiber delay lines are used to connect optical incept system with photoelectric conversion system,which plays roles of transmitting the laser,delaying the optical signals and encoding the optical signals simultaneously. Because the length of optical fiber delay lines is different, the laser pulse received by the optical windows will produce different time delay.Thus the transition of the laser azimuth information to the time information is realized.Because the length of optical fiber delay lines has direct effects on the volume of laser warning system, the optical loss ,the false alarm ratio and the optical fiber delay lines are permuted and combined based on the property of the laser pulse and the optimization theory. The optimal design ways of the length of optical fiber delay lines coding are brought forward,and the correlation theory is used for analysis and calculation. Arranging mode of full direction matrix is attained,and accordingly the relevant arranging principle is educed. According to the principal the permutation and combination are put up to the optical fiber delay lines.Accordingly the optimization of the total length of the optical fiber delay lines is obtained in theory, which provides the important theoretical argument for the optimization design of laser directional detection warning system.