Laser Technology in Commercial Atomic Clocks

Huifang Lin, Yuan Tian, Jie‐Hua Chen +1 more

Rb vapor cell with differential detection. Elliptically polarized light is used to interact with alkali atoms to generate coherent population trapping (CPT) resonance, and the CPT signal is obtained by detecting the Faraday rotation effect with differential detection technology. To move closer to an actual chip-scale atomic clock (CSAC), we reduce the volume of the experimental apparatus and use a divergent laser beam to interact with the atoms. We obtain the short-term frequency stability of the CSAC based on the differential detection scheme and compare it with that of a conventional CSAC. The results show that the frequency stability is more than two times better than that of current commercial CSAC devices with the same power consumption and volume.

Kurt Gibble

Bruno Pelle, Bruno Desruelle, Ramon Szmuk +1 more

Laser cooled atomic clocks allow to both extend spectroscopy duration and better control the systematics. We present a commercial microwave clock that achieve an extreme stability and accuracy in the 10-15range within a day, with a turnkey product dedicated for continuous long-term operation.

Taeg Yong Kwon, Dai-Hyuk Yu

G. Mileti, C. Affolderbach, Renaud Matthey-de-l'Endroit

Bruno Pelle, Ramon Szmuk, Bruno Desruelle +2 more

Laser cooled atomic clocks allow to both extend spectroscopy duration and better control the systematics. We present a commercial microwave clock that achieve an extreme stability of 3.2×10-13at 1 s and 1×10-15in less than 2 days, with a turnkey product dedicated for continuous long-term operation.