一种基于非扫描式F-P标准具的激光告警虚警抑制方法

为了降低激光告警系统的虚警率,提出了一种基于非扫描式F-P标准具结构的光学虚警抑制方法。该方法采用相干长度作为判据,因此可大大抑制背景辐射的干扰。通过计算机仿真验证了该方案的可行性。对该方案中的关键技术F-P标准具的设计进行了详细讨论,定性分析了F-P标准具结构参数对其工作性能的影响,并通过实验优选确定设计参数。结果表明,该方案结构简单,可有效排除非相干光的干扰,光学虚警率近乎为0,漏警率小于0.25%。

False alarm suppression method for laser warning system based on nonscanning Fabry-Perot etalon structure

A scheme of optical false alarm suppression based on non-scanning Fabry-Perot (F-P) etalon structure is proposed in order to reduce the false alarm rate of a laser warning system. Employing coherent length as a specific attribute of laser radiation to distinguish it from non-coherent background radiation,the approach's feasibility is validated through computer simulation. The design of F-P etalon,the key element in the scheme,is discussed,and preliminary tests have been conducted to optimize the performance of the F-P etalon. The analytical results indicate that the simple design is feasible and effective,both the optical false alarm rate and the miss alarm rate are nearly 0% and less than 0.25%,respectively.