164 citations · 261 across the 2 of their papers we have counts for
4 papers
Absolute frequency measurement of the 40Ca+ S1/2 - D5/2 clock transition
M. Chwalla, J. Benhelm, K. Kim +12
We report on the first absolute transition frequency measurement at the 10^{-15} level with a single, laser-cooled 40Ca+ ion in a linear Paul trap. For this measurement, a frequenc…
An Optical Lattice Clock with Spin-polarized 87Sr Atoms
Xavier Baillard, Mathilde Fouché, Rodolphe Le Targat +14
We present a new evaluation of an 87Sr optical lattice clock using spin polarized atoms. The frequency of the 1S0-3P0 clock transition is found to be 429 228 004 229 873.6 Hz with…
Accurate spectroscopy of Sr atoms
Irene Courtillot, Audrey Quessada-Vial, Anders Brusch +3
We report the frequency measurement with an accuracy in the 100 kHz range of several optical transitions of atomic Sr : at 689 nm, at 688 nm and $^3P_…
A clock transition for a future optical frequency standard with trapped atoms
I. Courtillot, A. Quessada, R. P. Kovacich +5
We report the first direct excitation of the strongly forbidden 5s2 1S0-5s5p 3P0 transition in 87Sr. Its frequency is 429 228 004 235 (20) kHz. A resonant laser creates a small lea…