干涉型激光雷达是通过相位干涉检测实现高精度目标距离探测的设备, 传统干涉型激光雷达相位探测灵敏度受到标准量子极限的限制, 从而限制了测距精度。为了进一步打破极限, 提高精度, 提出了基于压缩真空态注入的相位超灵敏度干涉型量子激光雷达方案, 可以使相位灵敏度突破标准量子极限, 并分别推导了Z探测法、强度差探测法和奇偶探测法情况下的相位灵敏度, 随后, 进行仿真计算, 并对性能的提升进行比较与分析。最后, 在灵敏度最好的奇偶探测法的基础上, 建立了存在传输损耗时的相位灵敏度模型, 讨论了实现超灵敏度允许的最大传输损耗。

Interferometric lidar is a device to achieve high precision distance detection by phase estimation. The phase sensitivity of the traditional interferometric lidar is limited by the standard quantum limit, this affecting the precision of ranging. In order to further break the limit and improve the system precision, a scheme of super-sensitivity interferometric quantum lidar with squeezed-vacuum injection was put forward, thus phase sensitivity breaking through the standard quantum limit. And the phase sensitivity of the system was derived with Z detection, intensity difference detection and parity detection method. Then, the ascension of performance was compared and analyzed by simulation calculation. Finally, on the basis of best detection method-parity detection, a phase sensitivity model with transmission loss was establised, and the maximum transmission loss allowed by super-sensitivity was discussed.