172 citations · 532 across the 6 of their papers we have counts for
6 papers
The optical calcium frequency standards of PTB and NIST
U. Sterr, C. Degenhardt, H. Stoehr +7
We describe the current status of the Ca optical frequency standards with laser-cooled neutral atoms realized in two different laboratories for the purpose of developing a possible…
Observation of Large Atomic-Recoil Induced Asymmetries in Cold Atom Spectroscopy
C. W. Oates, G. Wilpers, L. Hollberg
The atomic recoil effect leads to large (25 %) asymmetries in simple spectroscopic investigations of Ca atoms that have been laser-cooled to 10 microkelvin. Starting with spectra f…
Photoassociation spectroscopy of cold calcium atoms
C. Degenhardt, T. Binnewies, G. Wilpers +4
Photoassociation spectroscopy experiments on 40Ca atoms close to the dissociation limit 4s4s 1S0 - 4s4p 1P1 are presented. The vibronic spectrum was measured for detunings of the p…
An Optical Clock with Ultracold Neutral Atoms
G. Wilpers, T. Binnewies, C. Degenhardt +3
We demonstrate how to realize an optical clock with neutral atoms that is competitive to the currently best single ion optical clocks in accuracy and superior in stability. Using u…
Doppler cooling and trapping on forbidden transitions
T. Binnewies, G. Wilpers, U. Sterr +5
Ultracold atoms at temperatures close to the recoil limit have been achieved by extending Doppler cooling to forbidden transitions. A cloud of ^40Ca atoms has been cooled and trapp…
Phase-coherent frequency measurement of the Ca intercombination line at 657 nm with a Kerr-lens mode-locked femtosecond laser
J. Stenger, T. Binnewies, G. Wilpers +5
The frequency of the Calcium ^3P_1--^1S_0 intercombination line at 657 nm is phase-coherently measured in terms of the output of a primary cesium frequency standard using an optica…