Artículos de revistas
Free expanding cloud of cold atoms as an atomic standard: Ramsey fringes contrast
Fecha
2008Registro en:
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, v.25, n.6, p.909-914, 2008
0740-3224
10.1364/JOSAB.25.000909
Autor
MULLER, Stella Torres
MAGALHAES, Daniel Varela
BEBEACHIBULI, Aida
ORTEGA, Tiago Almeida
AHMED, Mushtaq
BAGNATO, Vanderlei Salvador
Institución
Resumen
A compact frequency standard based on an expanding cold (133)CS cloud is under development in our laboratory. In a first experiment, Cs cold atoms were prepared by a magneto-optical trap in a vapor cell, and a microwave antenna was used to transmit the radiation for the clock transition. The signal obtained from fluorescence of the expanding cold atoms cloud is used to lock a microwave chain. In this way the overall system stability is evaluated. A theoretical model based on a two-level system interacting with the two microwave pulses enables interpretation for the observed features, especially the poor Ramsey fringes contrast. (C) 2008 Optical Society of America.