Zobrazeno 1 - 10
of 186
pro vyhledávání: '"J.-C. Keller"'
Publikováno v:
Neuropsychology. 32(4)
This study examines the relative utility of a particular class of noninvasive functional biomarkers-sensory functions-for detecting those at risk of cognitive decline and impairment. Three central research objectives were examined including whether (
Publikováno v:
Optics & Laser Technology. 42:301-307
A simple all-optical technique for fixing the spectrum of the output from semiconductor laser at a chosen absorption atomic line is realized and studied. The technique, which is not of a laser locking type, uses a conventional diode laser without any
Publikováno v:
Le Journal de Physique IV. 10:Pr8-211
Les atomes de cesium issus d'un piege magneto-optique sont soumis au cours de leur chute a un potentiel magnetique harmonique. Par un choix approprie des conditions d'applications du champ magnetique pulse (instant d'application, duree du pulse, ampl
Publikováno v:
Le Journal de Physique IV. 10:Pr8-147
Nous avons realise une serie d'experiences d'interferometrie atomique de polarisation a 9 ondes avec des atomes froids de cesium. Les modes operatoires utilises sont proches de ceux que l'on rencontre en optique cristalline (interferometrie de polari
Publikováno v:
Physical Review A. 59:4636-4640
Autor:
L. Vernac, A. Pouderous, O. Gorceix, Bruno Laburthe-Tolra, E. Maréchal, R. Chicireanu, Q. Beaufils, J.-C. Keller
Publikováno v:
Annales de Physique. 32:171-173
We report the fast accumulation of up to 1 million 52 Cr metastable atoms in a mixed trap formed by the superposition of a quadrupolar magnetic trap and a strongly confining optical trap. The cloud is at a temperature of 100 μK with a peak density o
Publikováno v:
Optics Communications. 157:343-351
Spatial and spectral control of a ring laser with a homogeneously broadened active medium has been achieved using a bi-directional injection scheme. Such a type of injection provides a new technique to obtain a controlled pulsed laser emission spectr
Publikováno v:
The European Physical Journal D - Atomic, Molecular and Optical Physics. 2:195-198
The mechanical Stern-Gerlach effect is investigated in the case of a slow atomic cloud falling through an inhomogeneous magnetic field featuring a strong longitudinal gradient. The resulting Zeeman sublevel state selection is demonstrated under vario
Publikováno v:
Optics Communications. 134:85-90
Frequency-modulated selective reflection on Rb vapour has been used to measure the long range van der Waals atom-glass attraction potential and the RbRb collisional self-broadening for each hyperfine component of the 85 Rb D 1 line.
Publikováno v:
IEEE Journal of Quantum Electronics. 31:1253-1260
We have demonstrated that passive self-injection control is very effective in a CW Ti/sup 3+/:Al/sub 2/O/sub 3/ laser to produce high efficiency (/spl eta//spl sim/15%), narrow-line, two-wavelength emission. Light reinjection is achieved with an orig