SI-traceable frequency dissemination at 1572.06 nm in a stabilized fiber network with ring topology
Dominik Husmann, Laurent-Guy Bernier, Mathieu Bertrand, Davide Calonico, Konstantinos S. Chaloulos, Gloria Clausen, Cecilia Clivati, Jérôme Faist, Ernst Heiri, U. Hollenstein, Anatoly Johnson, Fabian Mauchle, Ziv Meir, F. Merkt, Alberto Mura, Giacomo Scalari, Simon Scheidegger, Hansjürg Schmutz, Mudit Sinhal, Stefan Willitsch, Jacques Morel
Abstract
Frequency dissemination in phase-stabilized optical fiber networks for metrological frequency comparisons and precision measurements are promising candidates to overcome the limitations imposed by satellite techniques. However, in an architecture shared with telecommunication data traffic, network constraints restrict the availability of dedicated channels in the commonly-used C-band . Here, we demonstrate the dissemination of an SI-traceable ultrastable optical frequency in the L-band over a 456 km fiber network with ring topology, in which data traffic occupies the full C-band . We characterize the optical phase noise and evaluate a link instability of 4.7 × 10 -16 at 1 s and 3.8 × 10 -19 at 2000 s integration time, and a link accuracy of 2 × 10 -18 . We demonstrate the application of the disseminated frequency by establishing the SI-traceability of a laser in a remote laboratory. Finally, we show that our metrological frequency does not interfere with data traffic in the telecommunication channels. Our approach combines an unconventional spectral choice in the telecommunication L-band with established frequency-stabilization techniques, providing a novel, cost-effective solution for ultrastable frequency-comparison and dissemination, and may contribute to a foundation of a world-wide metrological network.