前言激光警报系统在激光对抗中起着重要作用。激光侦察报警是实施激光干扰的前提。在作战中只有首先查明激光威胁源的特性,才能采取有效的干扰手段消除这种威胁。激光警报系统是在激光传感器观察和预判定算法所获数据的基础上,自动地判定异常现象和状态的仪器。它可以判明目标的存在及其参数(辐射强度、波长、带宽、位置等),最后可以声、光或数据形式告警,或直接控制干扰系统施放干扰。这种警报系统,有的能简单地探测单个事件,有的能探测、鉴别和定位多种武器交战中的多种威胁。警报系统可分为主动和被动系统两种;按其接收原理可分为相干(外差)探测和非相干(直接)探测两种。目前激光对抗用的警报系统一般采用直接探测法。相干(外差)接收方案目前仅用于近距离目标避撞告警,它一般用10.6微米波长的CO_2激光器,探 Introduction Laser warning systems play an important role in laser confrontation. Laser reconnaissance alarm is the premise of the implementation of laser interference. Only by first identifying the characteristics of a laser threat source in combat can we take effective measures to dispel this threat. Laser warning system is based on laser sensor observation and pre-decision algorithm based on the data obtained, the automatic determination of anomalies and the status of the instrument. It can identify the existence of the target and its parameters (radiation intensity, wavelength, bandwidth, location, etc.), and finally can alarm sound, light or data form, or directly control the interfering system to exert interference. Some such alarm systems can simply detect a single incident and others can detect, identify and locate multiple threats to the engagement of many kinds of weapons. Alarm system can be divided into two kinds of active and passive systems; according to its receiving principle can be divided into coherent (heterodyne) detection and non-coherent (direct) detection of two. The current laser confrontation alarm system generally used direct detection method. Coherent (heterodyne) reception scheme is currently only used for near-target collision avoidance warning, it is generally 10.6 micron wavelength CO_2 laser probe