作为一类重要的光学器件,光学谐振腔在激光、光通信、光学传感等领域也有着广泛的应用。对谐振腔性能的有效表征，包括品质因子、传输谱等，是实现上述应用的重要前提。而对于相位信号的提取，如果只使用一个干涉信号，就会导致动态范围极为有限，虽然可以通过你和手段部分解决，但数据处理相对复杂。本文拟依靠成熟的相干检测技术对F-P标准具进行测量，将光波的相位关系或频率状态以及它们随时间的变化以光强度随空间分布或随时间变化的形式展现出来，期望做到对相位的变化的连续实时检测，并可以进一步应用到具有复杂耦合的谐振腔体系的研究。

As a kind of important optical devices, optical resonators are also widely used in the fields of laser, optical communication, optical sensing and so on. The effective characterization of resonator performance, including quality factor and transmission spectrum, is an important premise to realize the above applications. For the extraction of phase signal, if only one interference signal is used, the dynamic range will be extremely limited. Although it can be partially solved by you and means, the data processing is relatively complex. This paper intends to rely on the mature coherent detection technology to measure the F-P etalon, and show the phase relationship or frequency state of light waves and their changes with time in the form of light intensity changing with space or time. It is expected to achieve the continuous real-time detection of phase changes, and can be further applied to the research of resonator system with complex coupling.