Exploring New Approaches to Coherent Population Trapping Atomic Frequency Standards

吕利强 Lü Liqiang, Runchang Du, 刘朝阳 Liu Chaoyang +1 more

A. Godone, Filippo Levi, Jaques Vanier

The description of a new type of frequency standard based on coherent population trapping (CPT) in cesium is given. The phenomenon creates a magnetization oscillating at the hyperfine frequency. Microwave radiation emitted by such a magnetization is detected by means of a microwave cavity. The process takes place without population inversion. Results are given for continuous and pulsed operation. The possibility of using the CPT coherent microwave emission as the basis of a frequency standard is analyzed.

Jacques Vanier, Martin W. Levine, DANIEL JANSSEN +1 more

Vishal Shah, John E. Kitching

Jaques Vanier, M. W. Levine, D. Janssen +1 more

Coherent population trapping in alkali atoms has opened a new avenue in the implementation of atomic frequency standards having promising characteristics for field use. The paper reviews the state of the art in this subject and describes recent results obtained in the case of a passive Rb standard implemented using such an approach.