Theoretical and experimental results of optically pumped sodium atoms

Zhang, Xiaoxu; Ge, Lili; Zhao, Hu; Ren, Qiongying; Ma, Xingqiao

doi:10.1016/j.optcom.2020.125793

Cited by 2 publications

(1 citation statement)

References 29 publications

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“…As a key instrument in the field of quantum measurement technology, laser OPMs have a sensitivity that is more than one order of magnitude higher than traditional light OPMs [21,22]. At present, the core materials available for OPMs include He, K, Rb, Cs, Na, and their mixed fillers [18,[23][24][25][26]. Rubidium laser OPMs, which use high-abundance 87 Rb isotopes as the core material, have advantages such as high sensitivity for magnetic anomaly detection, miniaturization, and no need for low-temperature conditions, making them an international research focus.…”

Section: Introductionmentioning

confidence: 99%

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

Xu,

Ren,

Xiang

et al. 2023

Sensors

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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.

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Section: Introductionmentioning

confidence: 99%

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

Xu,

Ren,

Xiang

et al. 2023

Sensors

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show abstract

Compact magneto-optical traps using planar optics

Tan 谭,

Lu 鹿,

Han 韩

et al. 2024

Chinese Phys. B

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Magneto-optical traps (MOTs) composed of magnetic fields and light fields have been widely utilized to cool and confine microscopic particles. Practical technology applications require miniaturized MOTs. The advancement of planar optics has promoted the development of compact MOTs. In this article, we review the development of compact MOTs based upon planar optics. At first, we introduce the standard MOTs. We then introduce the grating MOTs with micron structures, which have been used to build cold atomic clocks, cold atomic interferometers, and ultra-cold sources. In further, we introduce the integrated MOTs based on nanoscale metasurfaces. These new compact MOTs greatly reduce volume and power consumption, and provide new opportunities for fundamental research and practical applications.

show abstract

Theoretical and experimental results of optically pumped sodium atoms

Cited by 2 publications

References 29 publications

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

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

Compact magneto-optical traps using planar optics

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