A 920-kilometer optical fiber link for frequency metrology at the 19th decimal place.

  title={A 920-kilometer optical fiber link for frequency metrology at the 19th decimal place.},
  author={Katharina Predehl and Gesine Grosche and Sebastian M. F. Raupach and Stefan Droste and Osama Terra and Janis Alnis and Th Legero and Theodor W. H{\"a}nsch and Th. Udem and R. Holzwarth and Harald Schnatz},
  volume={336 6080},
Optical clocks show unprecedented accuracy, surpassing that of previously available clock systems by more than one order of magnitude. Precise intercomparisons will enable a variety of experiments, including tests of fundamental quantum physics and cosmology and applications in geodesy and navigation. Well-established, satellite-based techniques for microwave dissemination are not adequate to compare optical clocks. Here, we present phase-stabilized distribution of an optical frequency over 920… CONTINUE READING
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P. Gill
Riehle, Proceedings of the 20th European Frequency and Time Forum, Braunschweig, Germany, 27 to 30 March • 2006


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