光纤磁场传感器具有抗干扰能力强、小型化、低成本等技术优势。为了实现对空间磁场矢量的测量，基于磁光晶体提出了一种光纤三维磁场传感器。然后，设计和构建了光纤三维磁场传感器传感探头，搭建了光纤三维磁场测量系统。分析基于磁光晶体光纤三维磁场传感器的非正交误差，通过对基于磁光晶体的光纤三维磁场传感器三个传感单元两两夹角的准确测量，对系统三轴非正交误差进行标定补偿。实验测试装置利用一对通电线圈构建一维磁场对光纤三维磁场传感器系统进行三维正交标定，三轴标定精度分别为0.19°、0.26°和0.22°。实验结果表明，该基于磁光晶体光纤三维磁场传感器可实现0.2 μT磁场强度分辨率和0.5°角度分辨率的磁场矢量测量。

An optical fiber magnetic field sensor has the technical advantages of strong anti-interference ability, miniaturization, and low cost. An optical fiber three-dimensional magnetic field sensor based on a magneto-optical crystal is proposed, in order to achieve the measurement of the space magnetic field vector. Moreover, a three-dimensional fiber optic vector of a magnetic field sensor probe has been designed, constructed, and experimentally demonstrated. The non-orthogonal error of the three-dimensional fiber optic vector of a magnetic field sensor is analyzed, and through the accurate measurement of the angle between the three sensing units of the optical fiber three-dimensional magnetic field sensor based on magneto-optical crystal, the system's three-axis non-orthogonal error is calibrated and compensated. The experimental test device uses a pair of energized coils to build a one-dimensional magnetic field, and calibrate the three-dimensional optical fiber with the three-dimensional magnetic field sensor system. The three-axis calibration accuracy is 0.19°, 0.26°, and 0.22°, respectively. The experimental results show that the three-dimensional magnetic field sensor based on magneto-optical crystal fiber can measure the magnetic field vector based on the resolution of 0.2 μT magnetic field intensity and 0.5° angle resolution.