The optical frequency of the 4s2S1/2 3d2 Ds/2 transition in a single trapped and laser-cooled 40 Ca＋ ion is measured with an optical frequency comb system referenced to a hydrogen maser, A 729-nm laser can be locked ...The optical frequency of the 4s2S1/2 3d2 Ds/2 transition in a single trapped and laser-cooled 40 Ca＋ 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.展开更多
基金Supported by the National Basic Research Program of China under Grant No 2005CB724500, the National Natural Science Foundation of China under Grant Nos 60490280, 10774161, 10504038 and 10874205, and Chinese Academy of Sciences （YOL2081001）.
文摘The optical frequency of the 4s2S1/2 3d2 Ds/2 transition in a single trapped and laser-cooled 40 Ca＋ 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.
