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| Content Provider | Springer Nature Link |
|---|---|
| Author | Gao, KeLin |
| Copyright Year | 2013 |
| Abstract | Research on the development of the optical frequency standard based on trapped and cold $^{40}$Ca$^{+}$ with the 4s $^{2}$S$_{1/2}$-3d $^{2}$D$_{5/2}$ clock transition at 729 nm 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 729 nm laser was reduced to less than 10 Hz 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. |
| Starting Page | 853 |
| Ending Page | 863 |
| Page Count | 11 |
| File Format | |
| ISSN | 10016538 |
| Journal | Chinese Science Bulletin |
| Volume Number | 58 |
| Issue Number | 8 |
| e-ISSN | 18619541 |
| Language | English |
| Publisher | SP Science China Press |
| Publisher Date | 2013-03-08 |
| Publisher Place | Heidelberg |
| Access Restriction | Subscribed |
| Subject Keyword | optical frequency standard single calcium ion systematic uncertainty absolute frequency measurement Science Life Sciences Physics Chemistry/Food Science Earth Sciences Engineering |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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