All-Optical Parametric-Resonance Magnetometer Based on <sup>4</sup>He Atomic Alignment
Parametric-resonance magnetometer is a high-sensitivity quantum sensor characterized by applying the non-resonant radio-frequency (RF) fields to the atomic ensemble. The RF fields lead to crosstalk in the multi-sensor design, thus disturbing the magnetic-field measurement results. We propose an opti...
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MDPI AG
2022-05-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/22/11/4184 |
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| author | Bowen Wang Xiang Peng Haidong Wang Wei Xiao Hong Guo |
| author_facet | Bowen Wang Xiang Peng Haidong Wang Wei Xiao Hong Guo |
| author_sort | Bowen Wang |
| collection | DOAJ |
| description | Parametric-resonance magnetometer is a high-sensitivity quantum sensor characterized by applying the non-resonant radio-frequency (RF) fields to the atomic ensemble. The RF fields lead to crosstalk in the multi-sensor design, thus disturbing the magnetic-field measurement results. We propose an optically modulated alignment-based <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mn>4</mn></msup></semantics></math></inline-formula>He parametric-resonance magnetometer. By using the fictitious field generated by the modulated light shift, parametric resonance is realized, and crosstalk caused by the magnetic RF field is prevented. The relative intensity noise of the lasers is suppressed to optimize the sensitivity of the magnetometer. Our magnetometer experimentally demonstrates a magnetic-field noise floor of 130 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mspace width="3.33333pt"></mspace><mi>fT</mi><mo>/</mo><msup><mi>Hz</mi><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msup></mrow></semantics></math></inline-formula> in both open- and closed-loop operations and has the potential to reach 70 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mspace width="3.33333pt"></mspace><mi>fT</mi><mo>/</mo><msup><mi>Hz</mi><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msup></mrow></semantics></math></inline-formula> when compared with the optimized magnetic RF scheme. It provides near-zero magnetic-field measurements with a 2 kHz bandwidth at room temperature, which is useful for high-bandwidth measurements in biomagnetic applications. |
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| spelling | doaj.art-9dcbde0a9fd74ee581063b52e34c39af2023-11-23T14:49:57ZengMDPI AGSensors1424-82202022-05-012211418410.3390/s22114184All-Optical Parametric-Resonance Magnetometer Based on <sup>4</sup>He Atomic AlignmentBowen Wang0Xiang Peng1Haidong Wang2Wei Xiao3Hong Guo4State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics, Center for Quantum Information Technology, Peking University, Beijing 100871, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics, Center for Quantum Information Technology, Peking University, Beijing 100871, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics, Center for Quantum Information Technology, Peking University, Beijing 100871, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics, Center for Quantum Information Technology, Peking University, Beijing 100871, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics, Center for Quantum Information Technology, Peking University, Beijing 100871, ChinaParametric-resonance magnetometer is a high-sensitivity quantum sensor characterized by applying the non-resonant radio-frequency (RF) fields to the atomic ensemble. The RF fields lead to crosstalk in the multi-sensor design, thus disturbing the magnetic-field measurement results. We propose an optically modulated alignment-based <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mn>4</mn></msup></semantics></math></inline-formula>He parametric-resonance magnetometer. By using the fictitious field generated by the modulated light shift, parametric resonance is realized, and crosstalk caused by the magnetic RF field is prevented. The relative intensity noise of the lasers is suppressed to optimize the sensitivity of the magnetometer. Our magnetometer experimentally demonstrates a magnetic-field noise floor of 130 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mspace width="3.33333pt"></mspace><mi>fT</mi><mo>/</mo><msup><mi>Hz</mi><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msup></mrow></semantics></math></inline-formula> in both open- and closed-loop operations and has the potential to reach 70 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mspace width="3.33333pt"></mspace><mi>fT</mi><mo>/</mo><msup><mi>Hz</mi><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msup></mrow></semantics></math></inline-formula> when compared with the optimized magnetic RF scheme. It provides near-zero magnetic-field measurements with a 2 kHz bandwidth at room temperature, which is useful for high-bandwidth measurements in biomagnetic applications.https://www.mdpi.com/1424-8220/22/11/4184parametric-resonance magnetometerhelium atomlight shift |
| spellingShingle | Bowen Wang Xiang Peng Haidong Wang Wei Xiao Hong Guo All-Optical Parametric-Resonance Magnetometer Based on <sup>4</sup>He Atomic Alignment Sensors parametric-resonance magnetometer helium atom light shift |
| title | All-Optical Parametric-Resonance Magnetometer Based on <sup>4</sup>He Atomic Alignment |
| title_full | All-Optical Parametric-Resonance Magnetometer Based on <sup>4</sup>He Atomic Alignment |
| title_fullStr | All-Optical Parametric-Resonance Magnetometer Based on <sup>4</sup>He Atomic Alignment |
| title_full_unstemmed | All-Optical Parametric-Resonance Magnetometer Based on <sup>4</sup>He Atomic Alignment |
| title_short | All-Optical Parametric-Resonance Magnetometer Based on <sup>4</sup>He Atomic Alignment |
| title_sort | all optical parametric resonance magnetometer based on sup 4 sup he atomic alignment |
| topic | parametric-resonance magnetometer helium atom light shift |
| url | https://www.mdpi.com/1424-8220/22/11/4184 |
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