In this paper we report the results we obtained with a prototype of pulsed optically pumped (POP) Rb clock. In terms of frequency stability, an Allan deviation σy (τ)=1.7 ×10 −13 τ −1/2 has been measured, where τis the integration time. In addition, the long term frequency drift results below 10 -14 /day. In the paper we also describe a technique to stabilize the amplitude of the microwave signal using the atoms themselves as discriminator. Moreover, an anomalously large temperature sensitivity of the clock frequency and a technique to keep it under control are also reported. Finally, we describe some non linear effects that modify the shape of the clock signal represented by the Ramsey central fringe.
Pulsed Optically Pumped Rb Clock: a High Stability Vapor Cell Frequency Standard / Levi, Filippo; Calosso, C. E.; Godone, A.; Micalizio, S.. - (2013), pp. 599-605. (Intervento presentato al convegno 2013 Joint UFFC, EFTC and PFM Symposium tenutosi a Prague, CZ nel 21-25 luglio 2013) [10.1109/EFTF-IFC.2013.6702182].
Pulsed Optically Pumped Rb Clock: a High Stability Vapor Cell Frequency Standard
LEVI, FILIPPO;C. E. Calosso;S. Micalizio
2013
Abstract
In this paper we report the results we obtained with a prototype of pulsed optically pumped (POP) Rb clock. In terms of frequency stability, an Allan deviation σy (τ)=1.7 ×10 −13 τ −1/2 has been measured, where τis the integration time. In addition, the long term frequency drift results below 10 -14 /day. In the paper we also describe a technique to stabilize the amplitude of the microwave signal using the atoms themselves as discriminator. Moreover, an anomalously large temperature sensitivity of the clock frequency and a technique to keep it under control are also reported. Finally, we describe some non linear effects that modify the shape of the clock signal represented by the Ramsey central fringe.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
