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Suppression of current source noise with an atomic magnetometer
Liang Shen1, Rui Zhang2, Teng Wu2
1Institute of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China.
The Review of Scientific Instruments
|September 3, 2020
Summary
This study presents a novel method using atomic magnetometers to suppress current noise, achieving approximately 27 dB reduction. Enhanced sensitivity and magnetic noise control can further improve this noise suppression technique.
Area of Science:
- Physics
- Metrology
- Instrumentation
Background:
- Current source noise poses challenges in sensitive measurements.
- Atomic magnetometers offer high sensitivity for magnetic field detection.
Purpose of the Study:
- To introduce a novel method for suppressing current source noise using atomic magnetometers.
- To quantify the noise-suppression performance of the proposed technique.
Main Methods:
- Employing a lamp-pumped cesium atomic magnetometer for noise suppression.
- Utilizing a higher-sensitivity laser-pumped cesium atomic magnetometer for noise measurement.
- Comparing noise levels before and after suppression at a 50 mA output current.
Main Results:
- Achieved a noise-suppression ratio of approximately 27 dB.
- Demonstrated the feasibility of using atomic magnetometers for active noise control.
- Identified sensitivity and ambient magnetic noise control as key factors for performance enhancement.
Conclusions:
- The developed method effectively suppresses current source noise.
- The technique holds potential for applications in metrology and fundamental physics.
- Further improvements are possible through enhanced magnetometer sensitivity and magnetic noise mitigation.
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