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Accéléromètre à atomes froids aéroporté pour un test du Principe d'Equivalence

Vincent Ménoret 1
1 Laboratoire Charles Fabry / Optique atomique
LCF - Laboratoire Charles Fabry
Abstract : In this thesis, we report on the study of a matter-wave inertial sensor, operated in an airplane carrying out parabolic flights.We have developped a compact and robust dual-wavelength laser source to cool and interrogate 87Rb and 39K atoms. It is based on frequency-doubled telecom lasers locked on a femtosecond optical frequency comb. The use of fibered optical components makes the setup intrinsically immune to vibrations and thermal fluctuations. The laser source was validated in flight by obtaining a double-species magneto-optical trap.We have used the source to carry out airborne measurements with an atom interferometer operating with cold 87Rb atoms. An auxiliary mechanical accelerometer makes it possible to increase the atomic sensor's dynamic range, and to record interference fringes despite the high level of acceleration fluctuations. This hybrid sensor has a resolution of 4.10-3 m.s-2.Hz-1/2, which is approximately 100 times lower than the typical vibration level in the plane.In the perspective of testing the equivalence principle with cold atoms in microgravity, we finally theoretically study the operation of a differential interferometer and investigate the influence of some systematic effects.
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Submitted on : Wednesday, October 31, 2012 - 3:02:22 PM
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Vincent Ménoret. Accéléromètre à atomes froids aéroporté pour un test du Principe d'Equivalence. Physique Atomique [physics.atom-ph]. Université Paris Sud - Paris XI, 2012. Français. ⟨NNT : 2012PA112183⟩. ⟨tel-00747538⟩

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