Cesium microwave emission without population inversion

Author

Levi, Filippo ; Godone, Aldo ; Vanier, Jacques

Author_Institution

Ist. Elettrotecnico Nazionale Galileo Ferraris, Torino, Italy

Volume

46

Issue

3

fYear

1999

fDate

5/1/1999 12:00:00 AM

Firstpage

609

Lastpage

615

Abstract

The use of coherent population trapping (CPT) for the realization of a Cs coherent microwave emitter without population inversion is described. Preliminary experimental results are reported regarding the radio frequency spectrum of the emitted microwave radiation, the emission profile width, and the transient behavior of the output power. This new approach, based on the coherence properties of the laser radiation, allows the implementation of a microwave frequency standard where the linear light shift is absent and the thermal noise limit for the frequency instability is below 10/sup -12/ for an integration time of 1 s.

Keywords

caesium; frequency stability; frequency standards; masers; thermal noise; 1 s; Cs; coherence properties; coherent microwave emitter; coherent population trapping; emission profile width; emitted microwave radiation; frequency instability; laser radiation; masers; microwave frequency standard; output power; radio frequency spectrum; thermal noise limit; transient behavior; Atom optics; Atomic beams; Atomic measurements; Electrical capacitance tomography; Masers; Microwave frequencies; Optical coupling; Optical noise; Optical pumping; Stationary state;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.764847

Filename

764847