Fig. 1. Schematic of rubidium atomic magnetometer

Fig. 2. Absorption of differently polarized light by ⁸⁷Rb. (a) Simplified energy-level diagram of ⁸⁷Rb; (b) ⁸⁷Rb pumped by left-circularly polarized light

Fig. 3. Schematic of precession of magnetic moment in different coordinate systems. (a) In rotating coordinate system; (b) in laboratory coordinate system

Fig. 4. Signals acquired by atomic magnetometer under different time duration of radio frequency field. (a) 10 ms; (b) 0.5 ms

Fig. 5. Analysis of experimental data under different time durations of π pulse (t_π). (a) Signals detected by atomic magnetometer under different time durations of π pulse (t_π); (b) relationship between1U and t_π; (c) time duration of each envelope in Download full size

Fig. 6. Sinusoidal voltage signals outputted by signal source with amplitude of 3.85 V, frequency of 70 kHz, and initial phase of 0. (a) Without load; (b) with RF coils as load

Fig. 7. Comparison of experimental results and theoretical simulation. (a) Results when t_π=0.4 ms and continuous time duration of RF field is 10 ms; (b)--(d) enlarged view of each envelope corresponding to each time duration in Fig.7(a)