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Horloge à réseau optique à atomes de Strontium

Abstract : This thesis presents the latest achievements regarding the optical lattice clock with Strontium atoms developed at LNE-SYRTE. After a review of the different types of optical clocks that are currently under development, we stress on the concept of optical lattice clock which was first imagined for 87Sr using the 1S0 - 3P0 transition. We exhibit the features of this atom, in particular the concept of magic wavelength for the trap, and the achievable performances for this kind of clock. The second part presents the experimental aspects, insisting particularly on the ultra-stable laser used for the interrogation of the atoms which is a central part of the experiment. Among the latest improvements, an optical pumping phase and an interrogation phase using a magnetic field have been added in order to refine the evaluation of the Zeeman effect. Finally, the last part presents the experimental results. The last evaluation of the clock using 87Sr atoms allowed us to reach a frequency accuracy of 2,6.10-15 and a measurement in agreement with the one made at JILA at the 10-15 level. On another hand, thanks to recent theoretical proposals, we made a measurement using the bosonic isotope 88Sr by adapting the experimental setup. This measurement represents the first evaluation for this type of clock, with a frequency accuracy of 7.10-14.
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https://tel.archives-ouvertes.fr/tel-00267252
Contributor : Xavier Baillard <>
Submitted on : Thursday, March 27, 2008 - 10:48:40 AM
Last modification on : Wednesday, May 15, 2019 - 3:58:35 AM
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  • HAL Id : tel-00267252, version 2

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Xavier Baillard. Horloge à réseau optique à atomes de Strontium. Physique Atomique [physics.atom-ph]. Université Pierre et Marie Curie - Paris VI, 2008. Français. ⟨tel-00267252v2⟩

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