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Scheme for suppressing atom expansion induced contrast loss in atom interferometers.

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Title: Scheme for suppressing atom expansion induced contrast loss in atom interferometers.
Authors: Hu, Qing-Qing1,2, Luo, Yu-Kun1,2, Jia, Ai-Ai1,2, Wei, Chun-Hua1,2, Yan, Shu-Hua1,2, Yang, Jun1,2 jyang@nudt.edu.cn
Source: Optics Communications. May2017, Vol. 390, p111-116. 6p.
Subjects: Atom interferometers, Radio pulse time modulation, Strategic planning, Optical communications, Simulation methods & models
Abstract: The loss of contrast due to atom expansion induced non-perfect Raman pulse area in atom interferometers is investigated systematically. Based on the theoretical simulation, we find that the expansion of the atomic cloud results in a decrease of the π pulse fidelity and a change of the π pulse duration, which lead to a significant reduction in fringe contrast. We propose a mitigation strategy of increasing the intensities of the second and third Raman pulses. Simulation results show that the fringe contrast can be improved by 13.6% in a typical atom interferometer gravimeter using this intensity compensation strategy. We also evaluate the effects of this mitigation strategy in the case of a lower atomic cloud temperature and a larger Raman beam size under different Raman pulse time interval conditions. This mitigation strategy has potential applications in increasing the sensitivity of atom interferometer-based precision measuring, including precision measuring of the gravity, gravity gradient, rotation, and magnetic field gradient, as well as testing of the Einstein equivalence principle. [ABSTRACT FROM AUTHOR]
Copyright of Optics Communications is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 120925427
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PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Scheme for suppressing atom expansion induced contrast loss in atom interferometers.
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  Data: <searchLink fieldCode="AR" term="%22Hu%2C+Qing-Qing%22">Hu, Qing-Qing</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Luo%2C+Yu-Kun%22">Luo, Yu-Kun</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Jia%2C+Ai-Ai%22">Jia, Ai-Ai</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Wei%2C+Chun-Hua%22">Wei, Chun-Hua</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Yan%2C+Shu-Hua%22">Yan, Shu-Hua</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Yang%2C+Jun%22">Yang, Jun</searchLink><relatesTo>1,2</relatesTo><i> jyang@nudt.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Optics+Communications%22">Optics Communications</searchLink>. May2017, Vol. 390, p111-116. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Atom+interferometers%22">Atom interferometers</searchLink><br /><searchLink fieldCode="DE" term="%22Radio+pulse+time+modulation%22">Radio pulse time modulation</searchLink><br /><searchLink fieldCode="DE" term="%22Strategic+planning%22">Strategic planning</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+communications%22">Optical communications</searchLink><br /><searchLink fieldCode="DE" term="%22Simulation+methods+%26+models%22">Simulation methods & models</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The loss of contrast due to atom expansion induced non-perfect Raman pulse area in atom interferometers is investigated systematically. Based on the theoretical simulation, we find that the expansion of the atomic cloud results in a decrease of the π pulse fidelity and a change of the π pulse duration, which lead to a significant reduction in fringe contrast. We propose a mitigation strategy of increasing the intensities of the second and third Raman pulses. Simulation results show that the fringe contrast can be improved by 13.6% in a typical atom interferometer gravimeter using this intensity compensation strategy. We also evaluate the effects of this mitigation strategy in the case of a lower atomic cloud temperature and a larger Raman beam size under different Raman pulse time interval conditions. This mitigation strategy has potential applications in increasing the sensitivity of atom interferometer-based precision measuring, including precision measuring of the gravity, gravity gradient, rotation, and magnetic field gradient, as well as testing of the Einstein equivalence principle. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Optics Communications is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.optcom.2016.12.054
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      – Code: eng
        Text: English
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        PageCount: 6
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    Subjects:
      – SubjectFull: Atom interferometers
        Type: general
      – SubjectFull: Radio pulse time modulation
        Type: general
      – SubjectFull: Strategic planning
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      – SubjectFull: Optical communications
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      – SubjectFull: Simulation methods & models
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      – TitleFull: Scheme for suppressing atom expansion induced contrast loss in atom interferometers.
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            NameFull: Hu, Qing-Qing
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              Text: May2017
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