Dans le cadre des séminaires organisés par le programme transverse GPPMM d’XLIM, Giorgio Santarelli, du LP2N-Laboratoire Photonique, Numérique et Nanosciences de l’Université de Bordeaux 1, donnera un séminaire intitulé « Ultra-stable frequency/time transfer with optical fiber for metrology » , le Lundi 28 Avril 2014 à 11h dans la salle de conférences XLIM, sur le site de La Borie à Limoges.

Nous vous attendons nombreux !

Abstract

The distribution and the comparison of ultra-stable frequency references using optical fibers have been greatly improved in the last ten years. I will present a review of the methods and the results obtained. The frequency/time stability and accuracy of optical links surpass the well-established methods using GNSS and geostationary satellites. It will be shown that it is possible to use public telecommunication network carrying Internet data to compare and distribute ultra-stable metrological signals of both frequency and time over long distances. In addition both frequency stability and accuracy are equivalent to those obtained with optical links developed using dedicated fiber networks. These technologies are implemented in REFIMEVE+, a project aiming at building a national-scale metrological network in France.

Biography of the author

Giorgio Santarelli received the degree "Laura in Ingegneria  Elettronica" in 1990 from the University of Ancona, Italy, and the Ph.D. degree from the Université Pierre et Marie Curie (Paris VI, France) in 1996. From 1991 to 2012 he has been research staff at LNE-SYRTE, Observatoire de Paris. In 2013 he join ta new laboratory (the LP2N) hosted the brand new facilities of the Institut d’Optique d’Aquitaine, nearby Bordeaux. His research interests spans from very low phase noise frequency synthesis, cold atoms frequency standards, long distance fiber optical frequency dissemination to ultra-stable lasers and femtosecond laser combs. He is author and co-author of more than 90 peer review technical articles. Giorgio Santarelli is also Associate Editor of the IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

Contact XLIM du séminaire : Fetah Benabid (f.benabid@xlim.fr)