261 citations · 1.5k across the 21 of their papers we have counts for
7 papers · 1 filter
Long-distance chronometric leveling with a portable optical clock
J. Grotti, I. Nosske, S. B. Koller +19
We have measured the geopotential difference between two locations separated by by comparison of two optical lattice clocks via an interferometric fiber link, uti…
Atomic Clocks for Geodesy
Tanja Mehlstäubler, Gesine Grosche, Christian Lisdat +2
We review experimental progress on optical atomic clocks and frequency transfer, and consider the prospects of using these technologies for geodetic measurements. Today, optical at…
Remote frequency measurement of the 1S0-3P1 transition in laser cooled Mg-24
J. Friebe, M. Riedmann, T. Wübbena +9
We perform Ramsey-Bordé spectroscopy on laser-cooled magnesium atoms in free fall to measure the 1S0 \rightarrow 3P1 intercombination transition frequency. The measured value of 65…
The 87-Sr optical frequency standard at PTB
St. Falke, H. Schnatz, J. S. R. Vellore Winfred +8
With 87-Sr atoms confined in a one dimensional optical lattice, the frequency of the optical clock transition 5s^2 ^1S_0 - 5s5p ^3P_0 has been determined to be 429 228 004 229 872.…
The stability of an optical clock laser transferred to the interrogation oscillator for a Cs fountain
B. Lipphardt, G. Grosche, U. Sterr +3
We stabilise a microwave oscillator at 9.6 GHz to an optical clock laser at 344 THz by using a fibre-based femtosecond laser frequency comb as a transfer oscillator. With a second…
Absolute frequency measurement of the magnesium intercombination transition
Jan Friebe, André Pape, Matthias Riedmann +9
We report on a frequency measurement of the clock transition of Mg on a thermal atomic beam. The intercombination transition has been referenced…