Operating an atom interferometer beyond its linear range

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dc.creatorMerlet, Sébastien
dc.creatorGouët, J. Le
dc.creatorBodart, Quentin
dc.creatorClairon, Andre
dc.creatorLandragin, Arnaud
dc.creatorSantos, Franck Pereira Dos
dc.creatorRouchon, Pierre
dc.date2008-06-01
dc.date.accessioned2026-07-07T12:24:16Z
dc.date.available2026-07-07T12:24:16Z
dc.descriptionIn 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 isolation, the use of a low noise seismometer for the measurement of ground vibrations allows our atom gravimeter to reach at night a sensitivity as good as $5.5\times10^{-8}$g at 1 s. Robustness of the measurement to large vibration noise is also demonstrated by the ability of our gravimeter to operate during an earthquake with excellent sensitivity. Our high repetition rate allows for recovering the true low frequency seismic vibrations, ensuring proper averaging. Such techniques open new perspectives for applications in other fields, such as navigation and geophysics.
dc.description20 pages, 8 figures
dc.identifierhttps://arxiv.org/abs/0806.0164
dc.identifierhttp://arxiv.org/abs/0806.0164
dc.identifierMetrologia 46, 1 (2009) 87-94
dc.identifierdoi:10.1088/0026-1394/46/1/011
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/214272
dc.subjectAtomic Physics
dc.titleOperating an atom interferometer beyond its linear range
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