An FSM-Assisted High-Accuracy Autonomous Magnetic Compensation Optimization Method for Dual-Channel SERF Magnetometers Used in Weak Biomagnetic Signal Measurement
Atomic magnetometers based on the spin-exchange relaxation-free (SERF) regime have broad applications in bio-magnetic measurement due to their high sensitivity and miniaturized size. In this paper, we propose a SERF-based magnetometer using 1 × 2 polarization-maintaining fiber (PMF) with single-beam...
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MDPI AG
2025-06-01
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| author | Xinran Tian Bo Bao Ridong Wang Dachao Li |
| author_facet | Xinran Tian Bo Bao Ridong Wang Dachao Li |
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| description | Atomic magnetometers based on the spin-exchange relaxation-free (SERF) regime have broad applications in bio-magnetic measurement due to their high sensitivity and miniaturized size. In this paper, we propose a SERF-based magnetometer using 1 × 2 polarization-maintaining fiber (PMF) with single-beam parameter optimization. The impacts of temperature, pumping laser power, and modulation amplitude on the magnetometer’s response signal at the SERF regime are examined. Moreover, through the simulation of zero-field resonance, the compensation accuracy is optimized. To further improve the compensation stability and accuracy, a novel finite state machine (FSM)-assisted iterative optimization magnetic field compensation algorithm is proposed. A pT-level compensation resolution with an error below 1.6% is achieved, which lays the foundation for the subsequent application of biomagnetic measurement arrays. |
| format | Article |
| id | doaj-art-a12507f909bd44e293b8ca67dbdf1871 |
| institution | OA Journals |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
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| spelling | doaj-art-a12507f909bd44e293b8ca67dbdf18712025-08-20T02:21:53ZengMDPI AGSensors1424-82202025-06-012512369010.3390/s25123690An FSM-Assisted High-Accuracy Autonomous Magnetic Compensation Optimization Method for Dual-Channel SERF Magnetometers Used in Weak Biomagnetic Signal MeasurementXinran Tian0Bo Bao1Ridong Wang2Dachao Li3State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, ChinaState Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, ChinaState Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, ChinaState Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, ChinaAtomic magnetometers based on the spin-exchange relaxation-free (SERF) regime have broad applications in bio-magnetic measurement due to their high sensitivity and miniaturized size. In this paper, we propose a SERF-based magnetometer using 1 × 2 polarization-maintaining fiber (PMF) with single-beam parameter optimization. The impacts of temperature, pumping laser power, and modulation amplitude on the magnetometer’s response signal at the SERF regime are examined. Moreover, through the simulation of zero-field resonance, the compensation accuracy is optimized. To further improve the compensation stability and accuracy, a novel finite state machine (FSM)-assisted iterative optimization magnetic field compensation algorithm is proposed. A pT-level compensation resolution with an error below 1.6% is achieved, which lays the foundation for the subsequent application of biomagnetic measurement arrays.https://www.mdpi.com/1424-8220/25/12/3690SERF atomic magnetometermagnetic field compensationfinite state machineiterative optimizationbiomagnetic measurement |
| spellingShingle | Xinran Tian Bo Bao Ridong Wang Dachao Li An FSM-Assisted High-Accuracy Autonomous Magnetic Compensation Optimization Method for Dual-Channel SERF Magnetometers Used in Weak Biomagnetic Signal Measurement Sensors SERF atomic magnetometer magnetic field compensation finite state machine iterative optimization biomagnetic measurement |
| title | An FSM-Assisted High-Accuracy Autonomous Magnetic Compensation Optimization Method for Dual-Channel SERF Magnetometers Used in Weak Biomagnetic Signal Measurement |
| title_full | An FSM-Assisted High-Accuracy Autonomous Magnetic Compensation Optimization Method for Dual-Channel SERF Magnetometers Used in Weak Biomagnetic Signal Measurement |
| title_fullStr | An FSM-Assisted High-Accuracy Autonomous Magnetic Compensation Optimization Method for Dual-Channel SERF Magnetometers Used in Weak Biomagnetic Signal Measurement |
| title_full_unstemmed | An FSM-Assisted High-Accuracy Autonomous Magnetic Compensation Optimization Method for Dual-Channel SERF Magnetometers Used in Weak Biomagnetic Signal Measurement |
| title_short | An FSM-Assisted High-Accuracy Autonomous Magnetic Compensation Optimization Method for Dual-Channel SERF Magnetometers Used in Weak Biomagnetic Signal Measurement |
| title_sort | fsm assisted high accuracy autonomous magnetic compensation optimization method for dual channel serf magnetometers used in weak biomagnetic signal measurement |
| topic | SERF atomic magnetometer magnetic field compensation finite state machine iterative optimization biomagnetic measurement |
| url | https://www.mdpi.com/1424-8220/25/12/3690 |
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