Journal of Hunan University of Science and Engineering

Analysis and utilization of interfering peak in optical magnetic resonance experiment

Yuehua Peng

Published Jan 1, 2008• 0 citations

Abstract

This paper analyses the cause that the interfering peak produces when Rubidium’s gF -factor is measured by the method of sweeping magnetic field in optical magnetic resonance experiment. And the horizontal vector of the earth’s magnetic field is skillfully calculated by utilizing the interfering peak.

Related papers

Data processing in optical magnetic resonance experiment

Hengzhi Zhou

When measuring Lande g_factor of rubidium(Rb) atom,many resonance frequencies are obtained.The results are effected by the magnetic field of earth and scan current.A reasonableness of method of data processing is described and a good result is achieved.

Experimental Technology and ManagementJan 1, 20080 citations

Determination of Optimum Parameter of Sweeping Field in Experiment of Optical-Magnetic Resonance and Analysis of Optical Pumping

Wang Hong-tao

The g gene of Rb atom and geomagnetic field were measured with the experiment of optical-magnetic resonance. The data from the experiment was analyzed and the optimum parameter of sweeping field was determined. The measured data were compared with theoretical value. The principle of optical pumping was analyzed theoretically.

Physics Examination and TestingJan 1, 20050 citations

Vector magnetic Field Measurement using Synchronous Coherent Population Trapping

G. S. Pati, Renu Tripathi, Mauricio Pulido +1 more

We are investigating magnetic resonance signals produced by SCPT to determine the direction of magnetic field. The essence of vector magnetic field measurement lies in studying the dependence of light transmission associated with SCPT resonances by rotating the linear polarization state of the light field. We are studying this effect by doing a proof-of-principle experiment in a rubidium vapor cell and also, using a theoretical model.

Frontiers in OpticsJan 1, 20221 citation

Multi-Parameter Optimization of Rubidium Laser Optically Pumped Magnetometers with Geomagnetic Field Intensity

Kun Xu, Xiuyan Ren, Yujie Xiang +7 more

Rubidium laser optically pumped magnetometers (OPMs) are widely used magnetic sensors based on the Zeeman effect, laser pumping, and magnetic resonance principles. They measure the magnetic field by measuring the magnetic resonance signal passing through a rubidium atomic gas cell. The quality of the magnetic resonance signal is a necessary condition for a magnetometer to achieve high sensitivity. In this research, to obtain the best magnetic resonance signal of rubidium laser OPMs in the Earth’s magnetic field intensity, the experiment system of rubidium laser OPMs is built with a rubidium atomic gas cell as the core component. The linewidth and amplitude ratio (LAR) of magnetic resonance signals is utilized as the optimization objective function. The magnetic resonance signals of the magnetometer experiment system are experimentally measured for different laser frequencies, radio frequency (RF) intensities, laser powers, and atomic gas cell temperatures in a background magnetic field of 50,765 nT. The experimental results indicate that optimizing these parameters can reduce the LAR by one order of magnitude. This shows that the optimal parameter combination can effectively improve the sensitivity of the magnetometer. The sensitivity defined using the noise spectral density measured under optimal experimental parameters is 1.5 pT/Hz1/2@1 Hz. This work will provide key technical support for rubidium laser OPMs’ product development.

SensorsNov 2, 20236 citations

Theoretical and experimental research on the process of optical pump magnetic resonance

Guangzhao Zhou

A theoretical model about the process of optical pump magnetic resonance resonance has been established by analyzing the atomic radiative transition process and transition rate. On the basis,the relationship between signal amplitude of optical pump magnetic resonance and the amplitude of sweep field has been derived and compared with the experimental results. It is found that theoretical calculation is in agreement well with the experimental results,thus,the experiment is of great significance on the deep understanding of the optical pump magnetic resonance process.

College PhysicsJan 1, 20130 citations

Saturation effect of atomic magnetic resonance

Hongying Yang, Yanhua Wang, Nan Zhao

In this paper, we experimentally study the saturation effect of rubidium atomic magnetic resonance. A pump beam is applied to create atomic spin polarization, a radio frequency (RF) magnetic field is used to drive the spin precession about a static magnetic field, and an off-resonant linearly polarized probe beam is applied to detect the spin dynamics based on the Faraday-rotation effect. When the RF magnetic field intensity becomes strong, a saturation effect is observed. We measure the resonant peak under strong RF magnetic field driving and obtain a saturation dip as an indication of the saturation effect. Furthermore, we show that the line-width of the saturation dip is much smaller than that of magnetic resonance. Accordingly, the sensitivity of the precision measurement based on the saturation dip can be significantly improved. The relations between the saturation dip in the resonant peak and the driving RF magnetic field intensity, as well as pumping intensity, are also studied in our experiment.

AIP AdvancesMay 1, 20203 citations