Effect Of Radio Frequency Magnetic Field On Atomic Magnetic Resonance Properties

In recent years,in the theory of atomic vector magnetometer with linear polarized light,based on the Hanle configuration,the scheme of adding a transverse radio frequency field(BRF)in the direction perpendicular to both the propagation vector and the polarization vector of the optical field has been studied extensively.In these studies,the magnetic vector will cause the tensor magnetic moment(MTM)of the ground state to process under the joint action of the magnetic vector and the rf field.To obtain magnetic field information by recording the procession information of MTM is the basic principle of magnetic measurement of MTM procession atomic magnetometer..Inspired by the principle of MTM magnetometer,a method of measuring rf field by means of weak field scan is theoretically discussed in this paper.In this paper,we choose to study the closed transition system of Fg=1? Fe=0 in 87Rb D2 transition hyperfine structure.First,the quantization axis of the system takes the direction of the electric vector of the driving light field,and the space angle between the applied static magnetic B0 and the quantization axis is ?.B0 will make Zeeman Splitting occur in the degenerate ground state energy level.And the resonant linear polarization laser will drive the transition of Fg=1?Fe=0 in the atoms.Meanwhile,a transverse strong rf field BR1,is added in the direction perpendicular to the propagation vector and electric polarization vector of the optical field.As the field to be measured,we need to measure the frequency and intensity of BRF1.Then,we add a weak rf field BRF2 in the same direction as BRF1 and scan its frequency ?2.By measuring the dc component of the transmitted light,we can get all the information of the rf field to be measured.First,by continuously changing the size of the static magnetic field,the distance between zeeman splits is continuously changed(this process is equivalent to scanning the size of ?)?we can get the DC signal peak that it is a bimodal structure split in the middle.Through the analytical solution of the system,we find that the splitting width between the two peaks is positively correlated with the size of B0,and the frequency at the minimum value between the two peaks is the frequency of the radio frequency magnetic field BRF1.Then,we will stop ? near the resonant frequency of BRF1,and then scan ?2,we will get two lorentz absorption peaks,the central frequency of the two peaks is the frequency of the rf field to be measured,the frequency difference between the two peaks is 2?,theoretically,by measuring the frequency difference of 2? one can determine the intensity of the rf field to be measured.In this way,all the information of the rf field to be measured can be theoretically obtained.