Fig. 1. Schematic diagram of the basic principle. (a) Operation process of atomic magnetometer; (b) atomic energy level of ⁸⁷Rb (D2 line is not shown here)

Fig. 2. System structure (the heating light beam is not shown here)

Fig. 3. Measurement results of X-axis. (a) System response curve along X-axis, the insets are system response curve along Y-axis and Z-axis; (b) system sensitivity along X-axis, and the insert shows the bandwidth

Fig. 4. Measurement results of Y-axis. (a) System response curves of the magnetic field along Y-axis for different amplitudes of bias magnetic field applied in Z-axis; (b) relationship between bias magnetic field and conversion factor; (c) relationship between linewidth and bias magnetic field; (d) system sensitivity and system bandwidth

Fig. 5. Measurement results of Z-axis. (a) System response curves of the magnetic field along Z-axis for different amplitudes of bias magnetic field applied in Y-axis; (b) relationship between bias magnetic field and conversion factor; (c) relationship between linewidth and bias magnetic field; (d) system sensitivity and system bandwidth