Influence of optical aberrations in an atomic gyroscope

The European Physical Journal D (Impact Factor: 1.23). 12/2005; 36(3):257-260. DOI: 10.1140/epjd/e2005-00255-9
Source: arXiv


In atom interferometry based on light-induced diffraction, the optical aberrations of the
laser beam splitters are a dominant source of noise and systematic effect.
In an atomic gyroscope, this effect is dramatically reduced by the use of two atomic sources. But it
remains critical while coupled to fluctuations of atomic trajectories, and appears as a main source of noise to the long term
stability. Therefore we measure these contributions in our set-up, using cold cesium atoms and stimulated Raman transitions.

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    • "This phase noise can be expressed as a random spatial displacement X(t) of deviation σ X = σ Φ /k of the retroreflecting mirror. The effect of other common-mode, spatial, Raman-phase fluctuations such as optical aberrations [39] can also be included in this fluctuating variable X. When calculating the differential response of the two-species atom interferometer, the relative phase noise between the two interferometers can be written ∆Φ = Φ K − Φ Rb = k K ˜ X where the standard deviations of˜X and X are simply related by a vernierscale relation "
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