Terahertz frequency standard based on three-photon coherent population trapping.
A scheme for a terahertz frequency standard based on three-photon coherent population trapping in stored ions is proposed. Assuming the propagation directions of the three lasers obey the phase matching condition, we show that stability of few 10(-14) at 1 s can be reached with a precision limited by power broadening to 10(-11) in the less favorable case. The referenced terahertz signal can be propagated over long distances, the useful information being carried by the relative frequency of the three optical photons.
Champenois
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C
Physique des Interactions Ioniques et Moléculaires, CNRS UMR 6633, Université de Provence, Centre de Saint Jérôme, Case C21, Marseille Cedex 20, France. caroline.champenois@univ-provence.fr
Hagel
G
G
Houssin
M
M
Knoop
M
M
Zumsteg
C
C
Vedel
F
F