Fig. 1. Schematic diagram. (a) Faraday magneto-optical effect; (b) optical fiber three-dimensional magnetic field sensor probe based on magneto-optical crystal

Fig. 2. Model diagram of three-dimensional magnetic field sensor based on the orthogonal correction analysis of magneto-optical crystal fiber

Fig. 3. Optical fiber three-dimensional magnetic field sensing system. (a) System composition diagram; (b) structure diagram of magneto-optical crystal sensing probe

Fig. 4. Test results of sensing coefficients of three sensing units of three-dimensional fiber optic vector magnetic field sensor based on magneto-optical crystal

Fig. 5. Triaxial orthogonal calibration experiment of three-dimensional magnetic field sensor based on magneto-optical crystal. (a) Measuring device for included angle of sensing unit; (b) schematic diagram of the principle of measuring the angle of sensing unit, and the included angle of two sensing units ω_ab=ω_b0－ω_a0

Fig. 6. Measurement results of the three-dimensional fiber optic vector magnetic field sensor based on magneto-optical crystal. (a) Measurement results of three-dimensional sensor when YOZ plane rotates 720° parallel to magnetic field vector; (b) measurement results of three-dimensional sensor when XOZ plane rotates 720° parallel to magnetic field vector; (c) measurement results of three-dimensional sensor when the magnetic field vector rotates 5° in steps of 0.5°

Table 1. Measurement results of the angle between two of the three sensing units of fiber three-dimensional magnetic field sensor based on magneto-optical crystal