Title :
Light shift in modulated coherent population trapping atomic clocks
Author :
Deng, Ke ; Guo, Tao ; Su, Juan ; Guo, Dengzhu ; Chen, Xuzong ; Wang, Zhong
Author_Institution :
Sch. of Electron. Eng. & Comput. Sci., Peking Univ., Beijing, China
Abstract :
We have studied the light shift in coherent population trapping (CPT) atomic clocks under full band modulation (FBM) and under half band modulation (HBM). The theoretical results show that the light shift under FBM is only 1/4 of the light shift under HBM. Our experimental results confirm the theoretical results. Therefore, we can easily improve the stability of CPT clocks by replacing HBM with FBM.
Keywords :
atomic clocks; optical modulation; radiation pressure; CPT atomic clock stability; coherent population trapping; full band modulation; half band modulation; laser fields; light shift; Atom lasers; Atomic beams; Atomic clocks; Frequency; Laser excitation; Laser modes; Laser theory; Optical modulation; Stability; Vertical cavity surface emitting lasers;
Conference_Titel :
Frequency Control Symposium, 2009 Joint with the 22nd European Frequency and Time forum. IEEE International
Conference_Location :
Besancon
Print_ISBN :
978-1-4244-3511-1
Electronic_ISBN :
1075-6787
DOI :
10.1109/FREQ.2009.5168341
