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为了对隐身性能高的飞行目标进行探测,对目标飞行过程中排放的尾气成分进行了分析,通过激光差分吸收原理对飞机尾气中的CO2进行探测,并比较了直接探测和相干探测的回波信噪比。结果表明,使用激光探测CO2气体发现飞行目标的方法是可行的,且相干混频对于差分吸收探测CO2而言,可以提高探测信噪比,滤除非相关的背景光。
In order to detect the flight targets with high stealth performance, the exhaust components of the target flight were analyzed, the CO2 in the tail gas of the aircraft was detected by the laser differential absorption principle, and the echo signals of the direct detection and the coherent detection were compared Noise ratio. The results show that it is feasible to use laser to detect CO2 gas to find the target of flight, and coherent mixing can improve the signal-to-noise ratio of detection and filter out irrelevant background light for differential absorption detection of CO2.