A cold atom pyramidal gravimeter with a single laser beam

Bodart, Q.; Merlet, S.; Malossi, N.; Dos Santos, F. Pereira; Bouyer, P.; Landragin, A.
March 2010
Applied Physics Letters;3/29/2010, Vol. 96 Issue 13, p134101
Academic Journal
We demonstrate a scheme for realizing a compact cold atom gravimeter. The use of a hollow pyramidal configuration allows to achieve all functions: trapping, interferometer and detection with a unique laser beam leading to a drastic reduction in complexity and volume. In particular, we demonstrate a relative sensitivity to acceleration of gravity (g) of 1.7×10-7 at one second, with a moderate laser power of 50 mW. This simple geometry combined to such a high sensitivity opens wide perspectives for practical applications.


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