Compact atomic clock based on Coherent Population Trapping

Stéphane Guérandel, Jean-Marie Danet, Peter Yun +1 more

Jaques Vanier

Sinda Mejri, François Tricot, Jean-Marie Danet +3 more

Toward the next generation of compact devices, atomic clocks based on coherent population trapping (CPT) offer a very interesting alternative. We present a review of our studies on the short and mid term stability of a compact high performance atomic clock based on CPT in view of portable applications.

Peter Yun, Claudio Eligio Calosso, François Tricot +3 more

Based on the constructive polarization modulation coherent population trapping, we demonstrated a cw mode CPT clock with a short-term fractional frequency stability at the level of 4.2 x 10-13 ?-1/2 up to the averaging time of 100 seconds. This high performance and compact CPT atomic clock would lead more applications which concern on both the frequency stability and the compactness.

Vishal Shah, John E. Kitching

Junyi Duan, Xiaochi Liu, Ning Ru +2 more

The combination of coherent population trapping (CPT) physics and grating magneto-optical trap (GMOT) holds a potential of developing the next generation high performance compact atomic clock. In this work, we aim to build a Rb atomic clock that combining double-modulation coherent population trapping (DM-CPT) in GMOT system. In order to maximize the atoms trapped in clock transition, circularly polarization laser beam is replaced by modulated σ+and σ-beam, with which high-contrast and narrow-linewidth CPT signal could be observed. Also the GMOT system is designed for the interrogation of laser-cooled atoms. This work could provide foundation of high performance compact cold-atom CPT clock.