本文在FPGA、直接数字频率合成(DDS)、数字鉴相等技术的基础上,设计并实现了相位式光纤测量电路,用于基于光纤的激光测距校正系统中光纤光程的测量。本文介绍了相位法测量的基本原理,对其电路设计和关键技术的实现进行了论述,并给出了系统的实际测量结果,为光纤光程的测量和标定提供了一个可行的方案和参考。 Based on the technologies of FPGA, DDS, digital phase detector and so on, this paper designs and realizes the phase fiber measurement circuit, which is used to measure the fiber optical path in the fiber laser-based laser ranging system. This paper introduces the basic principle of phase method measurement, discusses its circuit design and key technologies, and gives the actual measurement results of the system. It provides a feasible scheme and reference for the measurement and calibration of fiber optical path.