Optical frequency standard based on a single 40Ca~+

被引：0

作者：

GAO KeLin ^{[1
]}

机构：

[1] State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Key Laboratory of Atomic Frequency Standards, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences

来源：

Science Bulletin | 2013年 / 08期

基金：

中国国家自然科学基金;

关键词：

optical frequency standard; single calcium ion; systematic uncertainty; absolute frequency measurement;

D O I：

暂无

中图分类号：

TN248 [激光器];

学科分类号：

0803 ; 080401 ; 080901 ;

摘要：

Research on the development of the optical frequency standard based on trapped and cold 40 Ca+ with the 4s2S1/2-3d2D5/2 clock transition at 729nm is reported. A single calcium ion was trapped and laser cooled in the Paul trap and stay in trap for more than 15 days. The linewidth of a 729nm laser was reduced to less than 10Hz by locking to a cavity for longer than 50 hours uninterruptedly. The overall systematic uncertainty of the clock transition has been characterized to be better than 6.5×10 16 . The absolute frequency of the clock transition was measured at 10 15 level using an optical frequency comb referenced to a Hydrogen maser, which was calibrated to the SI second through the global positioning system (GPS). The frequency value was 411042129776393.0(1.6)Hz after the correction of the systematic shifts.

引用

页码：853 / 863

页数：11