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In this paper, we report on development on an optical lattice clock using neutral mercury. Laser spectroscopy of the clock transition in fermionic isotope has been performed, which is an important step in this project.
Systematic effects on the stability (1.4 times 10-8g at 1s) and accuracy of a compact cold atoms gravimeter at SYRTE-LNE are studied with special emphasis on the effect due to light wave aberration of the Raman Lasers.
A Raman-Ramsey Cs cell atomic clock is presented. The relaxation times of the population and the hyperfine coherences in the cell are measured. The effect on the central Ramsey fringe amplitude of the critical experimental parameters such as laser intensity, magnetic field, temperature, and Ramsey time is investigated. The existence and impact of the additional Deltam = 2 transitions involved in the...
We demonstrate a laser system consisting of an external cavity diode laser phase-locked to another free-running one at a wavelength of 780 nm using an intracavity electro-optic phase modulator. A bandwidth of > 10 MHz and a phase noise of < -100 dBc/Hz at 1 MHz from the carrier are achieved.
We investigate the limits of our cold atoms interferometer to rotation and acceleration measurements. In contrast with previous atomic setups, emphasis was placed on the long term stability and compactness of the device through the use of laser cooled atoms, as previously shown with the field of atomic clock. It has been designed to give access to all six axes of inertia (three accelerations and three...
We are building a cold atom absolute gravimeter based on atom interferometry with a projected accuracy of 10-9 g. It is part of the French watt balance project intending to link the SI Kg unit to fundamental constants
We report new results on our matter-wave interferometer based inertial sensor, using stimulated Raman transitions to manipulate atomic wavepackets. The first atomic fringes have been observed, allowing for a preliminary Earth rotation rate measurement
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