Journal
OPTICS LETTERS
Volume 36, Issue 1, Pages 49-51Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.36.000049
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- Netherlands Organisation for Scientific Research (NWO)
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We demonstrate direct frequency-comb (FC) spectroscopy of the dipole-forbidden 4s(2)S(1/2)-3d(2)D(5/2) transition in trapped Ca-40(+) ions using an unamplified FC laser. The excitation is detected with nearly 100% efficiency using a shelving scheme in combination with single-ion imaging. The method demonstrated here has the potential to reach hertz-level accuracy, if a hertz-level linewidth FC is used in combination with confinement in the Lamb-Dicke regime. (C) 2010 Optical Society of America
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