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深空探测对于人类开发利用太空资源、探索宇宙起源具有重要意义。作为深空探测的一个重要组成部分,遥感载荷起着无法替代的作用。由于深空探测作用距离远,导致遥感载荷的信噪比很低,因此如何有效地从弱信号中检测出有用信号是深空探测技术中必需解决的关键技术。根据未来深空探测对低于散粒噪声的超微弱信号探测的需求,基于量子压缩态光场的散粒噪声小于标准量子极限的特点,提出一种基于量子压缩态光场的弱信号探测技术,给出了原理探索实验验证的结果。由于压缩光的量子特性会随着作用距离的增加而衰减,为了更贴近应用,设计了在接收端进行压缩光注入的新型激光雷达载荷方案,并给出了仿真的结果。
Deep space exploration is of great significance for human exploitation and utilization of space resources and exploration of the origin of the universe. As an important part of deep space exploration, remote sensing load plays an irreplaceable role. Because of the long distance of deep space exploration, the signal-to-noise ratio of remote sensing load is very low. Therefore, how to effectively detect the useful signal from weak signal is the key technology that must be solved in deep space exploration. According to the demand of ultra-weak signal detection below the shot noise by deep space exploration in the future, based on the characteristic that the shot noise of the quantum-squeezed state light field is smaller than the standard quantum limit, a weak signal detection technique based on the quantum-squeezed state light field , Gives the principle to explore the experimental verification results. In order to get closer to the application, a new Lidar load scheme for compressive light injection at the receiving end is designed and the simulation results are given as the quantum properties of the compressed light decay with the increase of the working distance.