Optically pumped Cs space clock development

Schmeissner, Roman; Favard, Pierre; Douahi, A.; Pérez, P.; Mestre, N.; Baldy, M.; Romer, Alfred; Chastellain, Frédéric; Coppoolse, W.; Bandel, N. von; Garcia, Michel; Krakowski, M.; Guérandel, Stéphane; Folco, Y.; Konrad, W.

doi:10.1109/fcs.2017.8088825

Cited by 5 publications

(1 citation statement)

References 3 publications

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“…Additionally, they are being widely used in many fields, such as precision measurement, positioning and navigation, and high-speed communication. However, most existing cesium beam atomic clocks utilize thermal atoms [2][3][4][5], and the thermal atoms move fast and the Ramsey fringe line width is difficult to decrease. Therefore, simultaneously meeting the requirements of small volume and high frequency stability is difficult [6].…”

Section: Introductionmentioning

confidence: 99%

An optically pumped atomic clock based on a continuous slow cesium beam

Xie

Wang

et al. 2022

Front. Phys.

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Herein, we report the scheme of an optically pumped atomic clock based on a cold cesium atomic beam source. We propose the laser system and physical mechanism of this atomic clock, wherein the atomic beam travels in an upper parabolic trajectory, thereby eliminating the light shift effect. In the experiments, when the length of the free evolution region was 167 mm, the line width of the Ramsey fringe was 37 Hz. When the expected signal-to-noise ratio of the Ramsey fringe that can be achieved is 36,000, the expected short-term frequency stability is about 3.6 × 10–14/√τ, which is significantly higher than that of a conventional optically pumped cesium clock of similar volume.

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Section: Introductionmentioning

confidence: 99%

An optically pumped atomic clock based on a continuous slow cesium beam

Xie

Wang

et al. 2022

Front. Phys.

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Past, present and future of atomic clocks for GNSS

Jaduszliwer

Camparo

2021

GPS Solut

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Optical detection in magnetic state-selection Cs beam tubes for transportable Cs beam clocks

Liu

Wang

Chen

et al. 2019

Meas. Sci. Technol.

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Cs beam clocks are indispensable instruments for time and frequency measurements. We adopt an optical detection method, which employs an external distributed-feedback laser diode, for counting the number of Cs atoms in a Cs beam tube using magnetic state selection. Our method converts the number of Cs atoms into that of emitted fluorescent photons, thereby largely enhancing the signal amplitude so that it can be detected by common circuits without involving additional noises. The signal-to-noise ratio in this experiment reaches 3000 in a bandwidth of 1 Hz. In comparison to the traditional detection method that adopts magnetic state-selectors, ionizers, mass spectrometers and electron multipliers, the optical detection method can simplify the structure and extend the lifetime of the Cs beam tubes. A Cs beam clock adopting this detection method demonstrates a short-term stability of 9 × 10 −12 τ −1/2 and has been operating continuously for more than nine months.

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Optically pumped Cs space clock development

Cited by 5 publications

References 3 publications

An optically pumped atomic clock based on a continuous slow cesium beam

An optically pumped atomic clock based on a continuous slow cesium beam

Past, present and future of atomic clocks for GNSS

Optical detection in magnetic state-selection Cs beam tubes for transportable Cs beam clocks

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