Article

Applied Physics B

, Volume 92, Issue 2, pp 133-144

Limits to the sensitivity of a low noise compact atomic gravimeter

  • J. Le GouëtAffiliated withLNE-SYRTE, CNRS UMR 8630, UPMC, Observatoire de Paris
  • , T.E. MehlstäublerAffiliated withLNE-SYRTE, CNRS UMR 8630, UPMC, Observatoire de Paris
  • , J. KimAffiliated withLNE-SYRTE, CNRS UMR 8630, UPMC, Observatoire de Paris
  • , S. MerletAffiliated withLNE-SYRTE, CNRS UMR 8630, UPMC, Observatoire de Paris
  • , A. ClaironAffiliated withLNE-SYRTE, CNRS UMR 8630, UPMC, Observatoire de Paris
  • , A. LandraginAffiliated withLNE-SYRTE, CNRS UMR 8630, UPMC, Observatoire de Paris
  • , F. Pereira Dos SantosAffiliated withLNE-SYRTE, CNRS UMR 8630, UPMC, Observatoire de Paris Email author 

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Abstract

A detailed analysis of the most relevant sources of phase noise in an atomic interferometer is carried out, both theoretically and experimentally. Even a short interrogation time of 100 ms allows our cold atom gravimeter to reach an excellent short term sensitivity to acceleration of 1.4×10-8g at 1 s. This result relies on the combination of a low phase noise laser system, efficient detection scheme and good shielding from vibrations. In particular, we describe a simple and robust technique of vibration compensation, which is based on correcting the interferometer signal by using the ac acceleration signal measured by a low noise seismometer.