Year: 2025
Type: article
Abstract: We present a detailed analysis of the end-user performance of the metrological signal at 1542 nm disseminated by the French national fiber network Refimeve, about 1000 km from the source. By means of a local ultrastable laser at 729 nm and an optical frequency comb, we are able to carry out instability and phase noise measurements of the signal with respect to the local laser. With a focus on phase noise analysis, we identify different timescales of interest for the use of this signal in optical frequency metrology. First, we identify a flicker frequency noise plateau at 2×10 −15 on the local laser between 1 and 12 s. We then deduce from our measurement that the linewidth of the received Refimeve laser is 6.2 kHz for an averaging time higher than 40 ms.
DOI: 10.1364/josab.569744
Institutions: Centre National de la Recherche Scientifique, Aix-Marseille Université, Physique des interactions ioniques et moléculaires, Université Sorbonne Paris Nord, Laboratoire de physique des lasers, Université de Lille, Université Paris Sciences et Lettres, Observatoire de Paris, Sorbonne Université, Laboratoire National de Métrologie et d'Essais, Laboratoire Temps Espace
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: Equipex, Agence Nationale de la Recherche
OpenAlex ID: W4414428722