Analysis and Suppression of the Cross-Axis Coupling Effect for Dual-Beam SERF Atomic Magnetometer
Spin-exchange relaxation-free (SERF) atomic magnetometers operated under a near-zero magnetic field are used for vector magnetic field measurements with high sensitivity. Previously, the cross-axis coupling error evoked by a nonzero background magnetic field has been verified to be adverse in modula...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-10-01
|
| Series: | Photonics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2304-6732/9/11/792 |
| _version_ | 1797466796095176704 |
|---|---|
| author | Fei Lu Shuying Wang Nuozhou Xu Bo Li Jixi Lu Bangcheng Han |
| author_facet | Fei Lu Shuying Wang Nuozhou Xu Bo Li Jixi Lu Bangcheng Han |
| author_sort | Fei Lu |
| collection | DOAJ |
| description | Spin-exchange relaxation-free (SERF) atomic magnetometers operated under a near-zero magnetic field are used for vector magnetic field measurements with high sensitivity. Previously, the cross-axis coupling error evoked by a nonzero background magnetic field has been verified to be adverse in modulated single-beam magnetometers. Here, in a dual-beam unmodulated SERF magnetometer, we propose a somewhat different solution model for the cross-axis coupling effect where the field of interest couples with the interference field. Considering two cases where the transverse or longitudinal background field exists, the cross-axis coupling effect dependence on multiple factors is investigated here based on the dynamic response under a background magnetic field within ±5 nT. The theoretical and experimental investigation suggests that it has an adverse impact on the output response amplitude and phase and tilts the sensitive axis by several degrees, causing a measurement error on the dual-beam magnetometer. To suppress this effect, the background magnetic field is compensated through the PI closed-loop control. The coupling effect is effectively suppressed by 1.5 times at the 10–40 Hz low-frequency band and the sensitivity reaches 2.4 fT/Hz<sup>1/2</sup>. |
| first_indexed | 2024-03-09T18:44:45Z |
| format | Article |
| id | doaj.art-256ca194f61f458fad2c35c6ef570846 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-09T18:44:45Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-256ca194f61f458fad2c35c6ef5708462023-11-24T06:22:23ZengMDPI AGPhotonics2304-67322022-10-0191179210.3390/photonics9110792Analysis and Suppression of the Cross-Axis Coupling Effect for Dual-Beam SERF Atomic MagnetometerFei Lu0Shuying Wang1Nuozhou Xu2Bo Li3Jixi Lu4Bangcheng Han5Key Laboratory of Ultra-Weak Magnetic Field Measurement Technology, Ministry of Education, School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, ChinaKey Laboratory of Ultra-Weak Magnetic Field Measurement Technology, Ministry of Education, School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, ChinaKey Laboratory of Ultra-Weak Magnetic Field Measurement Technology, Ministry of Education, School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, ChinaHangzhou Extremely Weak Magnetic Field Major Science and Technology Infrastructure Research Institute, Hangzhou 310051, ChinaKey Laboratory of Ultra-Weak Magnetic Field Measurement Technology, Ministry of Education, School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, ChinaKey Laboratory of Ultra-Weak Magnetic Field Measurement Technology, Ministry of Education, School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, ChinaSpin-exchange relaxation-free (SERF) atomic magnetometers operated under a near-zero magnetic field are used for vector magnetic field measurements with high sensitivity. Previously, the cross-axis coupling error evoked by a nonzero background magnetic field has been verified to be adverse in modulated single-beam magnetometers. Here, in a dual-beam unmodulated SERF magnetometer, we propose a somewhat different solution model for the cross-axis coupling effect where the field of interest couples with the interference field. Considering two cases where the transverse or longitudinal background field exists, the cross-axis coupling effect dependence on multiple factors is investigated here based on the dynamic response under a background magnetic field within ±5 nT. The theoretical and experimental investigation suggests that it has an adverse impact on the output response amplitude and phase and tilts the sensitive axis by several degrees, causing a measurement error on the dual-beam magnetometer. To suppress this effect, the background magnetic field is compensated through the PI closed-loop control. The coupling effect is effectively suppressed by 1.5 times at the 10–40 Hz low-frequency band and the sensitivity reaches 2.4 fT/Hz<sup>1/2</sup>.https://www.mdpi.com/2304-6732/9/11/792SERF atomic magnetometerbackground magnetic fieldtransverse dynamic interference fieldatomic spin vectorcross-axis couplingdynamic response |
| spellingShingle | Fei Lu Shuying Wang Nuozhou Xu Bo Li Jixi Lu Bangcheng Han Analysis and Suppression of the Cross-Axis Coupling Effect for Dual-Beam SERF Atomic Magnetometer Photonics SERF atomic magnetometer background magnetic field transverse dynamic interference field atomic spin vector cross-axis coupling dynamic response |
| title | Analysis and Suppression of the Cross-Axis Coupling Effect for Dual-Beam SERF Atomic Magnetometer |
| title_full | Analysis and Suppression of the Cross-Axis Coupling Effect for Dual-Beam SERF Atomic Magnetometer |
| title_fullStr | Analysis and Suppression of the Cross-Axis Coupling Effect for Dual-Beam SERF Atomic Magnetometer |
| title_full_unstemmed | Analysis and Suppression of the Cross-Axis Coupling Effect for Dual-Beam SERF Atomic Magnetometer |
| title_short | Analysis and Suppression of the Cross-Axis Coupling Effect for Dual-Beam SERF Atomic Magnetometer |
| title_sort | analysis and suppression of the cross axis coupling effect for dual beam serf atomic magnetometer |
| topic | SERF atomic magnetometer background magnetic field transverse dynamic interference field atomic spin vector cross-axis coupling dynamic response |
| url | https://www.mdpi.com/2304-6732/9/11/792 |
| work_keys_str_mv | AT feilu analysisandsuppressionofthecrossaxiscouplingeffectfordualbeamserfatomicmagnetometer AT shuyingwang analysisandsuppressionofthecrossaxiscouplingeffectfordualbeamserfatomicmagnetometer AT nuozhouxu analysisandsuppressionofthecrossaxiscouplingeffectfordualbeamserfatomicmagnetometer AT boli analysisandsuppressionofthecrossaxiscouplingeffectfordualbeamserfatomicmagnetometer AT jixilu analysisandsuppressionofthecrossaxiscouplingeffectfordualbeamserfatomicmagnetometer AT bangchenghan analysisandsuppressionofthecrossaxiscouplingeffectfordualbeamserfatomicmagnetometer |