Optimization of buffer gas pressure for Rb atomic magnetometer

Chen, Chang; Liu, Xiaohu; Qu, Tianliang; Yang, Kun

doi:10.1117/12.2193331

Cited by 1 publication

(1 citation statement)

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“…Zhang et al analytically and experimentally explored suitable parameters based on frequency values and power densities of excitation to achieve optimal performances [28]. There has been optimization research on a single parameter for rubidium SERF magnetometers [29] and Mx magnetometers [24], which has reference significance for rubidium laser Mz OPMs. Nevertheless, the magnetic resonance signal of rubidium laser OPMs is affected by multiple working parameters.…”

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%