Full hyperfine frequency modulation in the implementation of coherent population trapping atomic clocks

被引：24

作者：

Deng, Ke ^{[1
]}

Guo, Tao ^{[1
]}

Su, Juan ^{[1
]}

Guo, Dengzhu ^{[1
]}

Liu, Xinyuan ^{[1
]}

Liu, Lu ^{[1
]}

Chen, Xuzong ^{[1
]}

Wang, Zhong ^{[1
]}

机构：

[1] Peking Univ, Sch Elect Engn & Comp Sci, Beijing 100871, Peoples R China

来源：

PHYSICS LETTERS A | 2009年 / 373卷 / 12-13期

关键词：

Coherent population trapping; Atomic clock; Light shift;

D O I：

10.1016/j.physleta.2009.02.006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We compared full band modulation (FBM), in which the laser is modulated at the full ground-state hyperfine splitting frequency, and half band modulation (HBM) (widely used in research) in the implementation of coherent population trapping (CPT) atomic clock. Using FBM we can adjust the intensity ratio of the two laser fields to increase the CPT signal contrast as well as reduce the line width. Theoretical and experimental results also indicate that the use of FBM can significantly reduce light shift. Therefore. we can easily improve the stability of CPT clocks by replacing HBM with FBM. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1130 / 1132

页数：3

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