2009
DOI: 10.1088/0026-1394/46/1/011
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Operating an atom interferometer beyond its linear range

Abstract: In this paper, we show that an atom interferometer inertial sensor, when associated to the auxiliary measurement of external vibrations, can be operated beyond its linear range and still keep a high acceleration sensitivity. We propose and compare two measurement procedures (fringe fitting and nonlinear lock) that can be used to extract the mean phase of the interferometer when the interferometer phase fluctuations exceed 2π. Despite operating in the urban environment of inner Paris without any vibration isola… Show more

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Cited by 119 publications
(131 citation statements)
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“…These measurements led us to the determination of the gravity gradient with a precision of 4 E. We also demonstrated the ability of an atom gravimeter to be used in a mobile platform by measuring gravity in a moving elevator. Finally, we point out that technological developments concerning the vibration isolation system or the association with a classical accelerometer [8,18] have still to be made in order to have quantitative gravity measurements in mobile platforms.…”
Section: Effectmentioning
confidence: 99%
“…These measurements led us to the determination of the gravity gradient with a precision of 4 E. We also demonstrated the ability of an atom gravimeter to be used in a mobile platform by measuring gravity in a moving elevator. Finally, we point out that technological developments concerning the vibration isolation system or the association with a classical accelerometer [8,18] have still to be made in order to have quantitative gravity measurements in mobile platforms.…”
Section: Effectmentioning
confidence: 99%
“…Pour réduire plus encore l'influence du bruit de vibrations, nous utilisons deux accéléromètres méca-niques (modèle Titan de la société Nanometrics) positionnés en haut et en bas de la chambre d'expérience, et combinons leurs signaux pour calculer l'influence du bruit d'accélération sur l'interféromètre, selon la méthode introduite dans [14]. Pour caractériser le gain apporté par cette méthode de rejection des vibrations, nous présen-tons dans la figure 4 le signal de sortie de l'interféromètre en fonction de la phase interférométrique calculée à partir des signaux accélérométriques.…”
Section: Réjection Des Vibrations Et Performances Du Gyromètreunclassified
“…L'enceinte à vide est placée sur une plateforme d'isolation passive pour limiter les vibrations du miroir de rétroréflection. De plus, un sismomètre placé au sommet de l'enceinte permet de postcorriger ces vibrations et d'améliorer la sensibilité de mesure [45,46].…”
Section: Dispositifunclassified