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针对隐身飞机的隐身特性,提出一种采用分布式激光主动扫描照射和回波接收方式进行警戒探测的激光栅栏技术,作为目标探测的新型探测手段。给出了激光栅栏技术的原理和发射接收分机的组成,针对国外典型隐身飞机的部分飞行参数,进行了激光栅栏参数的初步设计,拟采用17.3 km为间隔设置激光发射接收装置,激光光束扫描角度为60°;采用重复频率20 k Hz,脉冲宽度10 ns,单脉冲能量3.2 m J,平均功率64 W的YAG激光器作为发射机;采用雪崩光电探测器进行接收。通过计算,可以实现对15 km飞行高度,1.5 Ma飞行速度的隐身飞机的探测需求。
Aiming at the stealth characteristics of stealthy aircraft, a laser fence technology using distributed laser active scanning illumination and echo receiving mode is proposed as a new detection method of target detection. The principle of laser fence technology and the composition of transmitting and receiving extension are given. According to some flight parameters of typical stealthy aircraft in foreign countries, laser fence parameters are preliminarily designed. It is proposed to set the laser transmitting and receiving device at 17.3 km intervals. The laser beam scanning angle 60 °. A YAG laser with a repetition rate of 20 k Hz, a pulse width of 10 ns, a single pulse energy of 3.2 m J and an average power of 64 W was used as a transmitter. An avalanche photodetector was used for reception. Through calculations, the detection needs of stealth aircraft at 15 km flight altitude and 1.5 Ma flight speed can be achieved.