A Multi-Pass Optically Pumped Rubidium Atomic Magnetometer with Free Induction Decay
A free-induction-decay (FID) type optically-pumped rubidium atomic magnetometer driven by a radio-frequency (RF) magnetic field is presented in this paper. Influences of parameters, such as the temperature of rubidium vapor cell, the power of pump beam, and the strength of RF magnetic field and stat...
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MDPI AG
2022-10-01
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| Online Access: | https://www.mdpi.com/1424-8220/22/19/7598 |
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| author | Lulu Zhang Yongbiao Yang Ni Zhao Jun He Junmin Wang |
| author_facet | Lulu Zhang Yongbiao Yang Ni Zhao Jun He Junmin Wang |
| author_sort | Lulu Zhang |
| collection | DOAJ |
| description | A free-induction-decay (FID) type optically-pumped rubidium atomic magnetometer driven by a radio-frequency (RF) magnetic field is presented in this paper. Influences of parameters, such as the temperature of rubidium vapor cell, the power of pump beam, and the strength of RF magnetic field and static magnetic field on the amplitude and the full width at half maximum (FWHM) of the FID signal, have been investigated in the time domain and frequency domain. At the same time, the sensitivities of the magnetometer for the single-pass and the triple-pass probe beam cases have been compared by changing the optical path of the interaction between probe beam and atomic ensemble. Compared with the sensitivity of ∼21.2 pT/<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mi>Hz</mi><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msup></semantics></math></inline-formula> in the case of the single-pass probe beam, the amplitude of FID signal in the case of the triple-pass probe beam has been significantly enhanced, and the sensitivity has been improved to ∼13.4 pT/<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mi>Hz</mi><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msup></semantics></math></inline-formula>. The research in this paper provids a reference for the subsequent study of influence of different buffer gas pressure on the FWHM and also a foundation for further improving the sensitivity of FID rubidium atomic magnetometer by employing a polarization-squeezed light as probe beam, to achieve a sensitivity beyond the photo-shot-noise level. |
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| last_indexed | 2024-03-09T21:10:04Z |
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| spelling | doaj.art-5a641a55943e4571bb0ebdc930a8f5262023-11-23T21:51:46ZengMDPI AGSensors1424-82202022-10-012219759810.3390/s22197598A Multi-Pass Optically Pumped Rubidium Atomic Magnetometer with Free Induction DecayLulu Zhang0Yongbiao Yang1Ni Zhao2Jun He3Junmin Wang4State Key Laboratory of Quantum Optics and Quantum Optics Decices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, ChinaState Key Laboratory of Quantum Optics and Quantum Optics Decices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, ChinaState Key Laboratory of Quantum Optics and Quantum Optics Decices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, ChinaState Key Laboratory of Quantum Optics and Quantum Optics Decices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, ChinaState Key Laboratory of Quantum Optics and Quantum Optics Decices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, ChinaA free-induction-decay (FID) type optically-pumped rubidium atomic magnetometer driven by a radio-frequency (RF) magnetic field is presented in this paper. Influences of parameters, such as the temperature of rubidium vapor cell, the power of pump beam, and the strength of RF magnetic field and static magnetic field on the amplitude and the full width at half maximum (FWHM) of the FID signal, have been investigated in the time domain and frequency domain. At the same time, the sensitivities of the magnetometer for the single-pass and the triple-pass probe beam cases have been compared by changing the optical path of the interaction between probe beam and atomic ensemble. Compared with the sensitivity of ∼21.2 pT/<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mi>Hz</mi><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msup></semantics></math></inline-formula> in the case of the single-pass probe beam, the amplitude of FID signal in the case of the triple-pass probe beam has been significantly enhanced, and the sensitivity has been improved to ∼13.4 pT/<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mi>Hz</mi><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msup></semantics></math></inline-formula>. The research in this paper provids a reference for the subsequent study of influence of different buffer gas pressure on the FWHM and also a foundation for further improving the sensitivity of FID rubidium atomic magnetometer by employing a polarization-squeezed light as probe beam, to achieve a sensitivity beyond the photo-shot-noise level.https://www.mdpi.com/1424-8220/22/19/7598optically pumped atomic magnetometersensitivityfree induction decaymulti-pass atomic vapor celllinewidth of magnetic resonance |
| spellingShingle | Lulu Zhang Yongbiao Yang Ni Zhao Jun He Junmin Wang A Multi-Pass Optically Pumped Rubidium Atomic Magnetometer with Free Induction Decay Sensors optically pumped atomic magnetometer sensitivity free induction decay multi-pass atomic vapor cell linewidth of magnetic resonance |
| title | A Multi-Pass Optically Pumped Rubidium Atomic Magnetometer with Free Induction Decay |
| title_full | A Multi-Pass Optically Pumped Rubidium Atomic Magnetometer with Free Induction Decay |
| title_fullStr | A Multi-Pass Optically Pumped Rubidium Atomic Magnetometer with Free Induction Decay |
| title_full_unstemmed | A Multi-Pass Optically Pumped Rubidium Atomic Magnetometer with Free Induction Decay |
| title_short | A Multi-Pass Optically Pumped Rubidium Atomic Magnetometer with Free Induction Decay |
| title_sort | multi pass optically pumped rubidium atomic magnetometer with free induction decay |
| topic | optically pumped atomic magnetometer sensitivity free induction decay multi-pass atomic vapor cell linewidth of magnetic resonance |
| url | https://www.mdpi.com/1424-8220/22/19/7598 |
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