| ATOMIC AND MOLECULAR PHYSICS |
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Frequency Measurement of the Electric Quadrupole Transition in a Single Laser-Cooled 40Ca+ |
| LIU Qu1,2,3, HUANG Yao1,2,3, CAO Jian1,2,3, OU Bao-Quan1,2,4, GUO Bin1,2**, GUAN Hua1,2, HUANG Xue-Ren1,2***, GAO Ke-Lin1,2***
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1State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics (WIPM), Chinese Academy of Sciences, Wuhan 430071
2Centers for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071
3Graduate School of the Chinese Academy of Sciences, Beijing 100049
4Department of Physics, Science College, National University of Defense Technology, Changsha 410073
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| Cite this article: |
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LIU Qu, HUANG Yao, CAO Jian et al 2011 Chin. Phys. Lett. 28 013201 |
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Abstract The optical frequency of the
4s2S1/2–3d2D5/2 transition in a single trapped and laser−cooled 40Ca+ ion is measured with an optical frequency comb system referenced to a hydrogen maser. A 729−nm laser can be locked to the clock transition about ten hours and the Allan deviation is better than 2×10-14/1000s.
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| Keywords:
32.80.Pj
43.58.Hp
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Received: 09 September 2010
Published: 23 December 2010
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| PACS: |
32.80.Pj
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43.58.Hp
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(Tuning forks, frequency standards; frequency measuring and recording instruments; time standards and chronographs)
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