大气闪烁对相干态量子干涉雷达探测性能的影响

Influence of Atmospheric Scintillation on Detection Performance of Coherent State Quantum Interferometric Radar

以马赫-曾德尔干涉仪为模型,分析了基于相干态光源的量子干涉雷达的探测原理,系统研究了由大气闪烁引起的光强起伏和大气损耗对量子干涉雷达性能的影响。将湍流大气视作耗散-涨落通道,结合经典湍流统计推导得到了湍流大气的透过率系数概率分布(PDTC)函数P(T)。利用P(T)分析了量子干涉雷达的灵敏度、分辨率,深入讨论了大气平均透过率T-A、闪烁指数β2D对其探测性能的影响。结果显示:高损耗环境中大气闪烁引起的透过率起伏能显著提高相干态量子干涉雷达的灵敏度。

Based on the Mach-Zehnder interferometer,the detection principle of quantum interferometric radar based on coherent state light source is analyzed.The influence of intensity fluctuation and atmospheric loss caused by atmospheric scintillation on the performance of quantum interferometric radar is studied systematically.Then,the atmospheric channel is regarded as dissipation-fluctuation channel.Based on the classical statistical theory of turbulence,the probability distribution of transmission coefficient（PDTC）function P（T）is derived.Furthermore,P（T）is used to investigate the sensitivity and resolution of the quantum interferometric radar,especially the influence of average transmission coefficient T-Aand the scintillation indexβ2 Don the detection performance of the quantum interferometric radar.These research results exhibit that,in a high-loss environment,the fluctuation of transmission caused by atmospheric scintillation is able to improve the sensitivity and resolution of the coherent state quantum interferometric radar remarkably.