Analysis of the noise sources in an optically pumped cesium beam resonator

Author

Dimarcq, Noel ; Giordano, Vincent ; Cerez, Pierre ; Theobald, Genevieve

Author_Institution

Lab. de l´´Horologe Atomique, Univ. Paris-Sud, Orsay, France

Volume

42

Issue

2

fYear

1993

fDate

4/1/1993 12:00:00 AM

Firstpage

115

Lastpage

120

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

Keywords

atomic beams; atomic clocks; caesium; measurement standards; optical pumping; random noise; atom-laser interaction; atomic shot noise; clock S/N ratio; clock signal detection; clock signal detection noise; fluorescence photon noise; laser frequency fluctuations; laser frequency noise; noise sources; optically pumped cesium beam resonator; random noise; theoretical model; Atom lasers; Atomic beams; Clocks; Laser excitation; Optical beams; Optical noise; Optical pumping; Optical resonators; Optical saturation; Signal detection;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.278532

Filename

278532