2008/01/08 by J. Le Gouët, Tanja Mehlstäubler, Jaewan Kim +4
Physics and Astronomy · #physics.atom-ph
paper · pdf · doi:10.1007/s00340-008-3088-1
published as Applied Physics B: Lasers and Optics 92, 2 (2008) 133-144 · 30 pages, 14 figures
arxiv created 2008/01/08 · arxiv updated 2009/12/01
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 1s. 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.