Atomic clock based on transient coherent population trapping

作者：Guo Tao; Deng Ke; Chen Xuzong; Wang Zhong^*

来源：Applied Physics Letters, 2009, 94(15): 151108.

DOI：10.1063/1.3120278

• atomic clocks
• atom-photon collisions
• frequency standards
• hyperfine structure
• light coherence
• quantum optics
• radiation pressure
• resonant states

We proposed a scheme to implement coherent population trapping (CPT) atomic clock based on the transient CPT phenomenon. We proved that the transient transmitted laser power in a typical Lambda system near CPT resonance features as a damping oscillation. Also, the oscillating frequency is exactly equal to the frequency detuning from the atomic hyperfine splitting. Therefore, we can directly measure the frequency detuning and then compensated to the output frequency of microwave oscillator to get the standard frequency. By this method, we can further simplify the structure of CPT atomic clock, and make it easier to be digitized and miniaturized.

• 出版日期2009-4-13
• 单位北京大学