一种应用于深空探测的弱信号探测技术

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。

A weak signal detection technique applied in deep space exploration

Deep space exploration has great significance for human being to develop and utilize space resources. Remote sensing payload is a very important part of deep exploration. Since the detection distance in the deep space exploration mission is very far, the SNR of the received signals is very low, the capture of extremely weak signals from deep space is a key technology. Based on the requirement of future deep space exploration for ultra weak signal detection, a week signal detection method was given. The method was based on quantum squeezed states, whose shot-noise was less than the standard quantum limit, and some experimental results were given. The result shows that this technique was a promising technology in future deep space exploration. Because the quantum properties of squeezed light is attenuated as the distance increases, in order to be closer to the application, a new laser radar scheme was designed which injected squeezed light at the receiving end, and simulation results were given.