High-performance laser-pumped rubidium frequency standard for satellite navigation
Date de parution
Electronic Letters, Institution of Engineering and Technology (IET), 2011/47/12/698–699
Presented is a double-resonance continuous-wave laser-pumped rubidium (Rb) atomic clock with a short-term stability of 4×10<sup>−13</sup> τ <sup> −1/2</sup> for integration times 1 s ≤ τ ≤ 1000 s, and a medium- to long-term stability reaching the 1×10<sup>−14</sup> level at 10<sup>4</sup> 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 dm<sup>3</sup> physics package volume only. The medium- to long-term clock stability is achieved by minimising the effects of light-shift and temperature coefficient on the atoms. Potential applications of the clock are discussed.
Type de publication