Two-Branch Fiber Link for International Clock Networks

Dan Xu (1) , Etienne Cantin (1, 2) , Florian Frank (1) , Nicolas Quintin (3) , Frédéric Meynadier (1) , Philip Tuckey (1) , Anne Amy-Klein (2, 4) , Olivier Lopez (2, 4) , Paul-Eric Pottie (1)

1 LNE - SYRTE - Laboratoire national de métrologie et d'essais - Systèmes de Référence Temps-Espace
2 LPL - Laboratoire de Physique des Lasers
3 RENATER
4 MMTF

We present our work on realizing two-branch fiber links enabling multiple-partner clock comparisons in Europe. We report in detail on the setup connecting two long haul links, and report for the relative frequency stability and accuracy. We report on a combined uptime of 90% for our dual-branch link during almost one month. We finally discuss the combined uncertainty contribution of the ensemble of the link architecture to a clock comparison. We show that the frequency transfer uncertainty is 2 × 10 −19 .

Domaines: Physique Quantique [quant-ph]; Instrumentations et Détecteurs [physics.ins-det]

Dan Xu, Etienne Cantin, Florian Frank, Nicolas Quintin, Frédéric Meynadier, et al.. Two-Branch Fiber Link for International Clock Networks. IEEE Transactions on Instrumentation and Measurement, 2019, 68 (6), pp.2195-2200. ⟨10.1109/TIM.2018.2886865⟩. ⟨hal-02190842⟩