763 citations · 3.1k across the 17 of their papers we have counts for
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physics.optics2014★ 76 cited
Ultra-stable laser with average fractional frequency drift rate below
Christian Hagemann, Christian Grebing, Christian Lisdat +6
Cryogenic single-crystal optical cavities have the potential to provide highest dimensional stability. We have investigated the long-term performance of an ultra-stable laser syste…
physics.atom-ph2014★ 53 cited
Direct comparison of optical lattice clocks with an intercontinental baseline of 9 000 km
H. Hachisu, M. Fujieda, S. Nagano +9
We have demonstrated a direct frequency comparison between two lattice clocks operated in intercontinentally separated laboratories in real time. Two-way satellite…