Journal ArticleDOI
Analysis of the noise sources in an optically pumped cesium beam resonator
N. Dimarcq,V. Giordano,P. Cerez,G. Theobald +3 more
- Vol. 42, Iss: 2, pp 115-120
TLDR
In this paper, the main noise sources that affect the clock signal detection in an optically pumped cesium beam resonator are determined and their influence on the clock S/N ratio is evaluated.Abstract:
The main noise sources that affect the clock signal detection in an optically pumped cesium beam resonator are determined and their influence on the clock S/N ratio is evaluated. The following noise sources are taken into account: atomic shot noise, fluorescence photon noise, laser frequency noise, and clock signal detection noise. A theoretical model that predicts the variations of the S/N ratio as a function of different parameters characterizing the atom-laser interaction is developed. The main conclusion concerns the saturation of S/N value for high atomic flux due to laser frequency fluctuations. All the theoretical predictions were experimentally verified. >read more
Citations
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Journal ArticleDOI
Efficient cooling and trapping of strontium atoms.
I. Courtillot,A. Quessada,R.P. Kovacich,Jean Jacques Zondy,Arnaud Landragin,André Clairon,Pierre Lemonde +6 more
TL;DR: The capture of cold strontium atoms in a magneto-optical trap (MOT) at a rate of 4 x 10(10) atoms/s is reported.
Journal ArticleDOI
A laser diode system stabilized on the Caesium D2 line
TL;DR: In this article, a complete diode laser system stabilized at 852 nm on the D2 line of Cs with a linewidth narrower than 100 kHz was described, intended to be employed for optical pumping, cooling, and detection of atoms in atomic frequency standards.
Journal ArticleDOI
Evaluation of the accuracy of the optically pumped caesium beam primary frequency standard of BNM-LPTF
A. Makdissi,E. de Clercq +1 more
TL;DR: In this article, the authors presented the main parts of the design of the LPTF-JPO and reported the short-term stability, σy(τ) = 3.5 × 10−13 τ−1/2, where τ is the averaging time.
Journal ArticleDOI
The classical caesium beam frequency standard: fifty years later
Jacques Vanier,Claude Audoin +1 more
TL;DR: The caesium beam frequency standard using the separated oscillatory field technique proposed by Ramsey in 1950 has seen intensive development over the last fifty years as mentioned in this paper, and its practical implementation as a primary time standard made possible the realization of the second with a precision better than that obtained by means of astronomical measurements and provided the basis for its redefinition in terms of atomic properties.
Journal ArticleDOI
A permanent Zeeman slower for Sr atomic clock
TL;DR: In this paper, a transverse Zeeman slower composed of an array of compactdiscrete neodymium magnets is described, and a simple and precisemodel of such a slower based on magnetic dipoles is developed.
References
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Journal ArticleDOI
La fluorescence de résonance : Etude par la méthode de l'atome habillé
TL;DR: In this paper, the dressed atom approach is used to calculate the fluorescence signals of a single atom in a compound system with laser photons, and the emission of fluorescence photons is then included as a radiative relaxation of this new quantum system.
Journal ArticleDOI
Ground state Zeeman coherence effects in an optically pumped cesium beam
TL;DR: In this article, the population trapping in a cesium beam induced at low magnetic field by σ polarized light from a broadband laser diode has been investigated, where the dip observed in the fluorescence is interpreted in terms of Zeeman coherences in the ground state which trap the atomic populations.
Journal ArticleDOI
Frequency stability of an optically pumped cesium beam frequency standard
TL;DR: In this article, an experimental optically pumped cesium beam frequency standard with a single semiconductor laser was used for the state selection and the atom detection and the measured short term frequency stability was given by σy(τ)=2×10−12τ−1/2 for 1 s <τ≲500 s.
Journal ArticleDOI
New design for a high performance optically pumped cesium beam tube
TL;DR: It has been verified that the magnetic field profile along the cesium beam does not induce Majorana transitions and gives an excellent amplitude signal to noise ratio equal to 20000 in a 1-Hz bandwidth.
Proceedings ArticleDOI
New design for an efficient optically pumped cesium beam tube
TL;DR: In this paper, an optically pumped cesium beam resonator that allows the optimization of the interaction processes among three magnetic regions has been designed, which can be operated at low C-field value without any loss of optical pumping efficiency.