Fig. 1. Schematic diagram of single beam measurement

Fig. 2. Schematic diagram of single-beam atomic magnetometer experiment

Fig. 3. Experimental setup of the atomic magnetometer

Fig. 4. Laser output power–current curve

Fig. 5. Relationship between laser temperature and optical power after pumping

Fig. 6. Absorption curve and dispersion curve of alkali metal atoms

Fig. 7. Testing results of linewidth for the atomic gas chamber

Fig. 8. Changes in sensitivity for different modulation amplitudes