多窗口编码激光预警系统设计

Design of Multi-window Code Laser Warning System

为了在激光告警中实现实时,全方位角度探测,且在探测角精度确定的前提下使结构简单、稳定,提出了基于多窗口编码的测量方法。该方法是通过在不同方向上放置特制的大视场光电探测器,通过探测电路的输出状态分析得到激光入射方向。在实验室条件下,利用衰减后的窄脉冲激光器测试光电探测器接收角与光电接收电路。实验表明:探测器接收端的接收角在偏移±30°时信号强度衰减为0°入射的-3 dB。光电接收电路能够接收距离为5 km,1 MW,发散角为2 m rad的激光测距机发出的激光信号。

In order to design the real-time and full-angle detection laser warning system,make simple,stable system under the premise of the accuracy of detection angle was determined,multi-window code optic antenna measurement method is proposed.The system sets special wide field photodiodes in different directions.The direction of incidence laser is obtained by the detecting circuit.Under laboratory conditions,using attenuated narrow pulse laser to measuring the optical fiber acceptance angle and detecting circuits.Experimental results show that： signal strength attenuated to-3dB,compared with the 0° incidence angle,when the deflection angle was ±30°.Accuracy of peak hold circuit was less than 2%.The circuit fitted for detecting weak narrow pulse laser（1 mW/cm2）,detect false rate was 1.5‰,laser warning system meet the design requirement.