Analysis and Suppression of Pump Beam Alignment Error in SERF Co-Magnetometer
The beam angle error of the pump light in a K-Rb-<sup>21</sup>Ne spin-exchange relaxation-free atomic co-magnetometer (SERFCM) significantly degrades the efficiency of optical pumping and the system’s ability to suppress magnetic field noise. In this work, a system response model that in...
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MDPI AG
2025-05-01
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| author | Qi Yuan Wenfeng Fan Haoying Pang Xue Han Zhuo Wang Wei Quan |
| author_facet | Qi Yuan Wenfeng Fan Haoying Pang Xue Han Zhuo Wang Wei Quan |
| author_sort | Qi Yuan |
| collection | DOAJ |
| description | The beam angle error of the pump light in a K-Rb-<sup>21</sup>Ne spin-exchange relaxation-free atomic co-magnetometer (SERFCM) significantly degrades the efficiency of optical pumping and the system’s ability to suppress magnetic field noise. In this work, a system response model that incorporates the pump beam alignment error (PBAE) is established. The influence of PBAE on the scale factor, bandwidth, and magnetic noise response of the inertial output is analyzed. Theoretical results show that PBAE increases the internal magnetic field gradient, reduces the efficiency of nuclear spin hyperpolarization, and increases the nuclear spin relaxation rate, ultimately degrading the system’s scale factor, bandwidth, and magnetic noise suppression capability. Experimental results demonstrate that, compared to the original SERFCM with PBAE, aligning the pump laser using the proposed method improves the polarization strength of nuclear spins by approximately 10% and enhances magnetic noise suppression by 40%. |
| format | Article |
| id | doaj-art-94e44643fe7149a69ab86b45adf6b576 |
| institution | Matheson Library |
| issn | 2304-6732 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-94e44643fe7149a69ab86b45adf6b5762025-06-25T14:19:02ZengMDPI AGPhotonics2304-67322025-05-0112655010.3390/photonics12060550Analysis and Suppression of Pump Beam Alignment Error in SERF Co-MagnetometerQi Yuan0Wenfeng Fan1Haoying Pang2Xue Han3Zhuo Wang4Wei Quan5School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, ChinaSchool of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, ChinaSchool of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, ChinaSchool of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, ChinaSchool of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, ChinaSchool of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, ChinaThe beam angle error of the pump light in a K-Rb-<sup>21</sup>Ne spin-exchange relaxation-free atomic co-magnetometer (SERFCM) significantly degrades the efficiency of optical pumping and the system’s ability to suppress magnetic field noise. In this work, a system response model that incorporates the pump beam alignment error (PBAE) is established. The influence of PBAE on the scale factor, bandwidth, and magnetic noise response of the inertial output is analyzed. Theoretical results show that PBAE increases the internal magnetic field gradient, reduces the efficiency of nuclear spin hyperpolarization, and increases the nuclear spin relaxation rate, ultimately degrading the system’s scale factor, bandwidth, and magnetic noise suppression capability. Experimental results demonstrate that, compared to the original SERFCM with PBAE, aligning the pump laser using the proposed method improves the polarization strength of nuclear spins by approximately 10% and enhances magnetic noise suppression by 40%.https://www.mdpi.com/2304-6732/12/6/550SERF co-magnetometerpump beam alignment errormagnetic noise |
| spellingShingle | Qi Yuan Wenfeng Fan Haoying Pang Xue Han Zhuo Wang Wei Quan Analysis and Suppression of Pump Beam Alignment Error in SERF Co-Magnetometer Photonics SERF co-magnetometer pump beam alignment error magnetic noise |
| title | Analysis and Suppression of Pump Beam Alignment Error in SERF Co-Magnetometer |
| title_full | Analysis and Suppression of Pump Beam Alignment Error in SERF Co-Magnetometer |
| title_fullStr | Analysis and Suppression of Pump Beam Alignment Error in SERF Co-Magnetometer |
| title_full_unstemmed | Analysis and Suppression of Pump Beam Alignment Error in SERF Co-Magnetometer |
| title_short | Analysis and Suppression of Pump Beam Alignment Error in SERF Co-Magnetometer |
| title_sort | analysis and suppression of pump beam alignment error in serf co magnetometer |
| topic | SERF co-magnetometer pump beam alignment error magnetic noise |
| url | https://www.mdpi.com/2304-6732/12/6/550 |
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