Frequency measurement of the optical clock transition of 40Ca+ ions with an uncertainty of 10-14 level
K Matsubara, K Hayasaka, Y Li, H Ito… - Applied physics …, 2008 - iopscience.iop.org
K Matsubara, K Hayasaka, Y Li, H Ito, S Nagano, M Kajita, M Hosokawa
Applied physics express, 2008•iopscience.iop.orgThe absolute frequency of the 4 2 S 1/2–3 2 D 5/2 optical clock transition of 40 Ca+ ions has
been measured for the first time with respect to the Système International (SI) second. A
single 40 Ca+ ion is laser-cooled in a small ion trap and the transition frequency is
measured as the average of two symmetrical Zeeman components. The frequency is
determined to be 411 042 129 776 385 (±18) Hz from 48 measurements.
been measured for the first time with respect to the Système International (SI) second. A
single 40 Ca+ ion is laser-cooled in a small ion trap and the transition frequency is
measured as the average of two symmetrical Zeeman components. The frequency is
determined to be 411 042 129 776 385 (±18) Hz from 48 measurements.
Abstract
The absolute frequency of the 4 2 S 1/2–3 2 D 5/2 optical clock transition of 40 Ca+ ions has been measured for the first time with respect to the Système International (SI) second. A single 40 Ca+ ion is laser-cooled in a small ion trap and the transition frequency is measured as the average of two symmetrical Zeeman components. The frequency is determined to be 411 042 129 776 385 (±18) Hz from 48 measurements.
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