Mainz 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 31: Poster: Quantum Optics and Photonics I
Q 31.39: Poster
Dienstag, 7. März 2017, 17:00–19:00, P OG1+2
A fibre link for optical clock comparison between London and Paris — •Jochen Kronjäger1, Giuseppe Marra1, Olivier Lopez2, Nicolas Quintin2, Anne Amy-Klein2, Won-Kyu Lee3,4, Paul-Eric Pottie3, and Harald Schnatz5 — 1NPL, Teddington, UK — 2LPL, Universite Paris 13, Villetaneuse, France — 3LNE-SYRTE, Observatoire de Paris, UPMC, Paris, France — 4KRISS, Daejon 305-340, South Korea — 5PTB, Braunschweig, Germany
Comparing independently built optical clocks is the main way of benchmarking this rapidly developing technology. Comparisons between different National Metrology Labs have traditionally employed satellite links which, however, lack the stability and accuracy needed for optical clocks. Optical frequency transfer through long-haul fibre links enables comparisons between remotely located optical clocks with a transfer stability and accuracy much better than state-of-the art clocks.
The London-Paris optical frequency fibre link has been established to compare the optical clocks developed at NPL and SYRTE. It utilizes around 800 km of commercial telecommunication fibre with 10 bidirectional optical amplifiers (EDFAs) installed at regular intervals. Our setup employs a novel hybrid topology which combines conventional active fibre noise compensation and two-way technology. We present details of the link implementation and characteristics, along with results from initial optical clock comparisons campaigns.
Together with the link between France and Germany, the London-Paris link will allow simultaneous comparisons of multiple remote clocks and chronometric levelling between the UK and Europe.