SI-traceable frequency dissemination at 1572.06 nm in a stabilized fiber network with ring topology

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, an architecture shared with telecommunication data traffic, network constraints restrict availability of dedicated channels commonly-used C-band . Here, we demonstrate SI-traceable ultrastable L-band over a 456 km ring topology, which traffic occupies full We characterize phase noise evaluate link instability 4.7 × 10 -16 at 1 s 3.8 -19 2000 integration time, accuracy 2 -18 application disseminated establishing SI-traceability laser remote laboratory. Finally, show that our does not interfere channels. Our approach combines unconventional spectral choice established frequency-stabilization techniques, providing novel, cost-effective solution frequency-comparison dissemination, may contribute foundation world-wide network.