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Influence of laser sources with different spectral properties on the performance of vapor cell atomic clocks based on lin‖lin CPT
Auteur(s)
Date de parution
2009
In
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Institute of Electrical and Electronics Engineers (IEEE), 2009/56/5/926-930
Résumé
We evaluate the influence of 2 types of laser sources with different spectral profiles on the performance of vapor cell atomic clocks based on lin
lin coherent population trapping (CPT) resonances. We show that a short-term stability of 1-2 • 10<sup>-11</sup>Τ<sup>-1/2</sup> may be reached in a compact system using a modulated vertical cavity surface-emitting laser. Here the stability is limited by the detection noise level and can be improved up to a factor of 4 by increasing the lock-in detection frequency to several tens of kilohertz, which is not possible in standard double resonance atomic clocks. We compare these results with CPT prepared under the same experimental conditions, using 2 phase-locked extended cavity diode lasers, with which we predict a challenging short-term stability of 1-3 • 10<sup>-13</sup>Τ<sup>-1/2</sup>, comparable to the state-of-the-art laser-pumped Rb-clocks.
Identifiants
Type de publication
journal article
