2011
DOI: 10.1049/el.2011.0389
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High-performance laser-pumped rubidium frequency standard for satellite navigation

Abstract: Presented is a double-resonance continuous-wave laser-pumped rubidium (Rb) atomic clock with a short-term stability of 4 × 10 213 t 21/2 for integration times 1 s ≤ t ≤ 1000 s, and a medium-to longterm stability reaching the 1 × 10 214 level at 10 4 s. The clock uses an Rb vapour cell with increased diameter of 25 mm, accommodated inside a newly developed compact magnetron-type microwave cavity. This results in a bigger signal with reduced linewidth, and thus improved short-term stability from a clock with 1 d… Show more

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Cited by 44 publications
(39 citation statements)
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“…The Doppler-broadened Rb absorption signal of the microfabricated Rb cell is used to lock the laser, which is a much simpler approach than saturated-absorption spectroscopy [6] and more compact than previous studies using a thin cesium cell [13,14]. In our case, the Doppler lines are further broadened due to collisions between the Rb atoms and the buffer gas, which corresponds to the practical case encountered for miniature atomic clocks [3].…”
Section: Frequency Stability Measurementsmentioning
confidence: 90%
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“…The Doppler-broadened Rb absorption signal of the microfabricated Rb cell is used to lock the laser, which is a much simpler approach than saturated-absorption spectroscopy [6] and more compact than previous studies using a thin cesium cell [13,14]. In our case, the Doppler lines are further broadened due to collisions between the Rb atoms and the buffer gas, which corresponds to the practical case encountered for miniature atomic clocks [3].…”
Section: Frequency Stability Measurementsmentioning
confidence: 90%
“…In such applications, on the one hand, there is the need of reducing the power consumption and the dimensions of the laser source, in order to facilitate the fabrication of portable devices; on the other hand, the demand for highly-stable laser sources is rapidly increasing, with the ever more widespread diffusion of applications based on, e.g. highresolution spectroscopy [1] or precise navigation systems using atomic clocks [6]. In this context, the objective of this research is to design and fabricate a compact and low-power frequency-stabilized laser, in particular for use in miniature atomic clocks [3].…”
Section: Introductionmentioning
confidence: 99%
“…The light power transmitted through the cell, as a function of the microwave frequency, is a measure of the atomic ground-state polarization and gives the clock signal. This signal typically has a Lorentzian shape [1,3], and stabilization of the quartz oscillato this signal realizes the clock. …”
Section: A Clock Principlementioning
confidence: 99%
“…In recent years, laser optical-pumping has substantially improved the achievable frequency stabilities of rubidium cell standards [1][2][3][4]. The compactness of these standards is beneficial in view of portable applications, such as GNSS, telecommunications etc.…”
Section: Introductionmentioning
confidence: 99%
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