Free expanding cloud of cold atoms as an atomic standard: Ramsey fringes contrast

Stella Torres Müller; Daniel Varela Magalhães; Aida Bebeachibuli; Tiago Almeida Ortega; Mushtaq Ahmed; Vanderlei Salvador Bagnato

doi:10.1364/JOSAB.25.000909

Free expanding cloud of cold atoms as an atomic standard

Ramsey fringes contrast

Stella Torres Müller^*, Daniel Varela Magalhães, Aida Bebeachibuli, Tiago Almeida Ortega, Mushtaq Ahmed, Vanderlei Salvador Bagnato

^*Corresponding author for this work

Research output: Contribution to journal › Article

7 Citations (Scopus)

Abstract

A compact frequency standard based on an expanding cold ¹³³Cs 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.

Original language	English
Pages (from-to)	909-914
Number of pages	6
Journal	Journal of the Optical Society of America B: Optical Physics
Volume	25
Issue number	6
DOIs	https://doi.org/10.1364/JOSAB.25.000909
Publication status	Published - 2008
Externally published	Yes

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abstract = "A compact frequency standard based on an expanding cold 133Cs 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.",

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Free expanding cloud of cold atoms as an atomic standard : Ramsey fringes contrast. / Müller, Stella Torres; Magalhães, Daniel Varela; Bebeachibuli, Aida; Ortega, Tiago Almeida; Ahmed, Mushtaq; Bagnato, Vanderlei Salvador.

In: Journal of the Optical Society of America B: Optical Physics, Vol. 25, No. 6, 2008, p. 909-914.

Research output: Contribution to journal › Article

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AU - Ahmed, Mushtaq

AU - Bagnato, Vanderlei Salvador

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