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Design of low-noise, fast-response electronics for high-performance helium optically pumped magnetometers
Xuan Wang1, Yu Wang1, Jiajun Yuan1
1Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
The Review of Scientific Instruments
|March 19, 2026
Summary
We developed a low-noise electronics design for helium optically pumped magnetometers (He-OPMs) to enhance geophysical measurements. This design improves sensitivity and bandwidth, crucial for accurate magnetic field detection.
Area of Science:
- Geophysics
- Atomic Physics
- Instrumentation
Background:
- High-sensitivity and wide-bandwidth magnetometers are essential for geophysical applications.
- Helium optically pumped magnetometers (He-OPMs) offer promising performance for these applications.
Purpose of the Study:
- To present a novel electronics design for He-OPMs.
- To improve the sensitivity, bandwidth, and accuracy of He-OPM measurements.
Main Methods:
- Developed a low-noise, fast-response electronics system for He-OPMs.
- Implemented a phase compensation technique to minimize signal transmission errors.
- Evaluated system performance using a frequency-stabilized laser and magnetic shielding.
Main Results:
- The electronics design demonstrated minimal influence on measurement accuracy (<40 pT per 1 μT).
- Achieved a system bandwidth of 650 Hz.
- Obtained a He-OPM sensitivity of 620 fT/√Hz at 1 Hz under closed-loop operation.
Conclusions:
- The proposed electronics design significantly enhances He-OPM performance.
- The system is suitable for high-precision geophysical measurements in ambient geomagnetic fields.
