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The Influence of Temperature on Frequency Modulation Spectroscopy in Atom Gravimeter

Atom gravimeters use locked lasers to manipulate atoms to achieve high-precision gravity measurements. Frequency modulation spectroscopy (FMS) is an accurate method of optical heterodyne spectroscopy, capable of the sensitive and rapid frequency locking of the laser. Because of the effective absorpt...

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Autores principales: Weng, Kanxing, Wu, Bin, Wang, Feichen, Zhang, Xiaohui, Zhou, Yin, Cheng, Bing, Lin, Qiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9781901/
https://www.ncbi.nlm.nih.gov/pubmed/36560298
http://dx.doi.org/10.3390/s22249935
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author Weng, Kanxing
Wu, Bin
Wang, Feichen
Zhang, Xiaohui
Zhou, Yin
Cheng, Bing
Lin, Qiang
author_facet Weng, Kanxing
Wu, Bin
Wang, Feichen
Zhang, Xiaohui
Zhou, Yin
Cheng, Bing
Lin, Qiang
author_sort Weng, Kanxing
collection PubMed
description Atom gravimeters use locked lasers to manipulate atoms to achieve high-precision gravity measurements. Frequency modulation spectroscopy (FMS) is an accurate method of optical heterodyne spectroscopy, capable of the sensitive and rapid frequency locking of the laser. Because of the effective absorption coefficient, Doppler broadening and susceptibility depend on temperature, and the signal-to-noise ratio (SNR) of the spectroscopy could be affected by temperature. We present a detailed study of the influence of the temperature on FMS in atom gravimeters, and the experimental results show that the SNR of the spectroscopy is dependent on temperature. In this paper, the frequency of the reference laser is locked by tracking the set point of the fringe slope of FMS. The influence of the frequency-locking noise of the reference laser on the sensitivity of the atom gravimeter is investigated by changing the temperature of the Rb cell without extra operations. The method presented here could be useful for improving the sensitivity of quantum sensors that require laser spectroscopic techniques.
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spelling pubmed-97819012022-12-24 The Influence of Temperature on Frequency Modulation Spectroscopy in Atom Gravimeter Weng, Kanxing Wu, Bin Wang, Feichen Zhang, Xiaohui Zhou, Yin Cheng, Bing Lin, Qiang Sensors (Basel) Communication Atom gravimeters use locked lasers to manipulate atoms to achieve high-precision gravity measurements. Frequency modulation spectroscopy (FMS) is an accurate method of optical heterodyne spectroscopy, capable of the sensitive and rapid frequency locking of the laser. Because of the effective absorption coefficient, Doppler broadening and susceptibility depend on temperature, and the signal-to-noise ratio (SNR) of the spectroscopy could be affected by temperature. We present a detailed study of the influence of the temperature on FMS in atom gravimeters, and the experimental results show that the SNR of the spectroscopy is dependent on temperature. In this paper, the frequency of the reference laser is locked by tracking the set point of the fringe slope of FMS. The influence of the frequency-locking noise of the reference laser on the sensitivity of the atom gravimeter is investigated by changing the temperature of the Rb cell without extra operations. The method presented here could be useful for improving the sensitivity of quantum sensors that require laser spectroscopic techniques. MDPI 2022-12-16 /pmc/articles/PMC9781901/ /pubmed/36560298 http://dx.doi.org/10.3390/s22249935 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Communication
Weng, Kanxing
Wu, Bin
Wang, Feichen
Zhang, Xiaohui
Zhou, Yin
Cheng, Bing
Lin, Qiang
The Influence of Temperature on Frequency Modulation Spectroscopy in Atom Gravimeter
title The Influence of Temperature on Frequency Modulation Spectroscopy in Atom Gravimeter
title_full The Influence of Temperature on Frequency Modulation Spectroscopy in Atom Gravimeter
title_fullStr The Influence of Temperature on Frequency Modulation Spectroscopy in Atom Gravimeter
title_full_unstemmed The Influence of Temperature on Frequency Modulation Spectroscopy in Atom Gravimeter
title_short The Influence of Temperature on Frequency Modulation Spectroscopy in Atom Gravimeter
title_sort influence of temperature on frequency modulation spectroscopy in atom gravimeter
topic Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9781901/
https://www.ncbi.nlm.nih.gov/pubmed/36560298
http://dx.doi.org/10.3390/s22249935
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