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Preliminary frequency measurement of the electric quadrupole transition in a single laser-cooled 40Ca+ ion |
Bin GUO (郭彬)1,2,3, Hua GUAN (管桦)1,2, Qu LIU (刘曲)1,2,3, Yao HUANG (黄垚)1,2,3, Wan-cheng QU (屈万成)1,2,3, Xue-ren HUANG (黄学人)1,2( ), Ke-lin GAO (高克林)1,2( ) |
1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China; 3. Graduate School, Chinese Academy of Sciences, Beijing 100080, China |
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Abstract The trapping and laser cooling of 40Ca+ ion on the way toward optical frequency standards have been developed. A single 40Ca+ ion is trapped in the miniature Paul trap and laser cooled by two frequency-stabilized diode lasers. A commercial Ti:Sapphire laser system at 729 nm is referenced to a high-finesse cavity to meet the requirements of ultra narrow linewidth of the 4s2S1/2-3d2D5/2 electric quadrupole transition. Its center frequency is preliminarily measured to be 411 042 129 686.1 (2.6) kHz. The attempt to finally lock the 729-nm laser system to atomic transition is made. Further work to improve the accuracy of measurement and the stabilization of system locking is in consideration and preparation.
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Keywords
ion trap
optical frequency standard
laser stabilization
laser cooling
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Corresponding Author(s):
Xue-ren HUANG (黄学人),Email:hxueren@wipm.ac.cn; Ke-lin GAO (高克林),Email:klgao@wipm.ac.cn
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Issue Date: 05 June 2009
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