Phase-coherent comparison of two optical frequency standards over 146 km using a telecommunication fiber link
Phase-coherent comparison of two optical frequency standards over 146 km using a telecommunication fiber link
We have explored the performance of two "dark fibers" of a commercial telecommunication fiber link for a remote comparison of optical clocks. The two fibers, linking the Leibniz University of Hanover (LUH) with the Physi-kalisch-Technische Bundesanstalt (PTB) in Braunschweig, are connected in Hanover to form a total fiber length of …