Optimal Operating Temperature of Miniaturized Optically Pumped Magnetometers

Zhang, Shaowen; Lu, Jixi; Ye, Mao; Zhou, Ying; Yin, Kaifeng; Lu, Fei; Yan, Yeguang; Zhai, Yueyang

doi:10.1109/tim.2022.3147901

Cited by 13 publications

(4 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The optimization of SERF magnetometer performance mainly revolves adjusting parameters like gas pressure, [20] temperature, [21] pump beam intensity and frequency, [22] probe beam intensity, frequency, [23] and other relevant factors. Once the operating parameters of the atomic vapor cell are determined, the most important aspect affecting the magnetometer's performance is the steady-state spin polarization (P z ) of the atomic ensemble.…”

Section: Introductionmentioning

confidence: 99%

Performance optimization of a SERF atomic magnetometer based on flat-top light beam

Yuan 袁,

Tang 唐,

Lin 林

et al. 2024

Chinese Phys. B

View full text Add to dashboard Cite

In this study, we explore the impact of pumping beams with different transverse intensity profiles on the performance of the spin-exchange relaxation-free (SERF) atomic magnetometers (AMs). We conduct experiments comparing the traditional Gaussian optically-pumped AM with that utilizing the flat-top optically-pumped (FTOP) method. Our findings reveal that the FTOP-based approach outperforms the conventional method, exhibiting a larger response, a narrower magnetic resonance linewidth, and a superior low-frequency noise performance. Specifically, the use of FTOP method leads to a 16% enhancement in average sensitivity within 1-30 Hz frequency range. Our research emphasizes the significance of achieving transverse polarization uniformity in AMs, providing insights for future optimization efforts and sensitivity improvements in miniaturized magnetometers.

show abstract

Section: Introductionmentioning

confidence: 99%

Performance optimization of a SERF atomic magnetometer based on flat-top light beam

Yuan 袁,

Tang 唐,

Lin 林

et al. 2024

Chinese Phys. B

View full text Add to dashboard Cite

show abstract

“…Typically, there are two general approaches to reaching the SERF regime. One is to increase the temperature and alkali metal density to a particular magnetic field range to increase the spin exchange rate [31]. The alternative is to lower the residual magnetic field to a specific operating temperature range to lower the Larmor precession rate [32].…”

Section: Introductionmentioning

confidence: 99%

Fast In-Situ Triaxial Remanent Magnetic Field Measurement for Single-Beam SERF Atomic Magnetometer Based on Trisection Algorithm

et al. 2023

View full text Add to dashboard Cite

We demonstrate a method for quickly and automatically detecting all three components of a remanent magnetic field around a shielded spin-exchange relaxation-free (SERF) atomic magnetometer (AM) using the trisection algorithm (TSA) for zero-field resonance (ZFR). To satisfy the measurement of AMs, a resonance light of the 87Rb D1 line with a spectral width of less than 1MHz is converted to circular polarization by a linear polarizer and a quarter-wave plate. After the light beam has passed through the alkali metal vapor cell, the residual magnetic field can be measured by searching for triaxial ZFR optical peaks. The TSA stably reduces the measurement time to 2.41 s on average and improves the measurement accuracy, significantly outpacing existing methods. The weighted averages of all measurements with corresponding uncertainties are (−15.437 ± 0.022)nT, (6.062 ± 0.021)nT, and (−14.158 ± 0.052)nT on the x-, y-, and z-axes, respectively. These improvements could facilitate more extremely weak magnetic studies in real time, such as magnetoencephalography (MEG) and magnetocardiography (MCG) measurements.

show abstract

“…The reason is that the atomic number density not only determines the polarization and relaxation of the atomic ensemble but also determines the response signal and measurement sensitivity [14,15]. Taking the single-beam SERF magnetometer as an example, high-precision measurement under the SERF regime requires high atomic number density, and the response signal strength is determined by the transmitted light intensity which is a function of the number density of the alkali metal atoms [16][17][18]. As the density of alkali-metal atoms is determined by the temperature of the vapor cell, accurate measurement of temperature is required for the highprecision atomic magnetometer [19,20].…”

Section: Introductionmentioning

confidence: 99%

In-situ measurement and close-loop control of atomic number density in an optically pumped magnetometer based on light absorption

Liu¹,

Lu²,

Yan³

et al. 2023

Meas. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

For optically pumped atomic magnetometers, the attenuation of the pumping light through the alkali-metal vapor due to light absorption is related to the number density of alkali-metal atoms. In this study, we propose an in-situ measurement and control method of atomic number density based on light absorption in the temperature range of 60 °C–160 °C, which is a much wider temperature range than considered in previous reports. A light absorption-density model is proposed to accurately describe the relationship between the light transmittance and the atomic number density. The influence of static and oscillating magnetic fields on the atomic number density measurement is also analyzed. Based on this model, a close-loop system is constructed to control the atomic number density using an electric heater. The experimental results exhibit that the proposed method can limit the fluctuation of the atomic number density in the range of 1.4%.

show abstract

Optimal Operating Temperature of Miniaturized Optically Pumped Magnetometers

Cited by 13 publications

References 33 publications

Performance optimization of a SERF atomic magnetometer based on flat-top light beam

Performance optimization of a SERF atomic magnetometer based on flat-top light beam

Fast In-Situ Triaxial Remanent Magnetic Field Measurement for Single-Beam SERF Atomic Magnetometer Based on Trisection Algorithm

In-situ measurement and close-loop control of atomic number density in an optically pumped magnetometer based on light absorption

Contact Info

Product

Resources

About