针对目前模拟微波光子信号在长距离传输中相位不稳的现象,提出了一种基于双载波矢量和原理的相位检测技术。文中对该技术的基本检测原理进行了详细推导;实验上以1GHz的射频信号为例,对其光路设计、实验进行了系统研究。实验结果显示,该相位检测系统可对1GHz信号实现精度优于3°的相位检测。基于该方案的相位检测系统由于分辨率高、结构简单、易于构建等优点可推广至毫米波频段,应用于光控相控阵、本振信号传输以及空间技术等多个领域的相位检测,进一步实现稳相传输。 In view of the phenomenon that the phase of the simulated microwave photonic signal is unstable during the long-distance transmission, a phase detection technique based on the principle of dual-carrier vector and principle is proposed. In this paper, the basic detection principle of this technique is deduced in detail. Taking the 1GHz RF signal as an example, the optical path design and experiment are systematically studied. The experimental results show that the phase detection system can achieve the phase detection of the 1GHz signal better than 3 °. The phase detection system based on this scheme can be extended to the millimeter wave band due to its high resolution, simple structure and easy construction. It is applied to the phase detection of light control phased array, local oscillator signal transmission and space technology and other fields Achieve steady-phase transmission.