A 1800-km optical fiber link for metrology, geodesy, and clock comparison

Mario Siciliani de Cumis; Cecilia Clivati; Luigi Santamaria Amato; Valentina Di Sarno; Anna Tampellini; Alberto Mura; Roberto Ricci; Federico Perini; Pasquale Maddaloni; Mauro Nanni; Roberto Ambrosini; Roberto Aiello; Claudio Bortolotti; Mauro Roma; Giuseppe Maccaferri; Matteo Stagni; Filippo Levi; Monia Negusini; Paolo De Natale; Giuseppe Bianco; Davide Calonico

doi:10.1117/12.2544970

25 February 2020 A 1800-km optical fiber link for metrology, geodesy, and clock comparison

Mario Siciliani de Cumis, Cecilia Clivati, Luigi Santamaria Amato, Valentina Di Sarno, Anna Tampellini, Alberto Mura, Roberto Ricci, Federico Perini, Pasquale Maddaloni, Mauro Nanni, Roberto Ambrosini, Roberto Aiello, Claudio Bortolotti, Mauro Roma, Giuseppe Maccaferri, Matteo Stagni, Filippo Levi, Monia Negusini, Paolo De Natale, Giuseppe Bianco, Davide Calonico

Author Affiliations +

Proceedings Volume 11296, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II; 112961X (2020) https://doi.org/10.1117/12.2544970
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

Nowadays, optical fiber links are key elements in optical metrology, spectroscopy, quantum communication and geodesy. In geodetic Very Long Baseline Interferometry, a local maser is responsible for providing time and frequency reference at radiotelescope. Here, we present our recent results on frequency dissemination using a coherent fiber link 1800 km long from Turin to Medicina and Matera, Italy. Metrological reference disseminated via fiber link improve the stability of about two order with respect to the local H-maser clocks. This kind of dissemination paves the way to VLBI observation using a remote clock reference on the Italian and European radio observatories.

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Mario Siciliani de Cumis, Cecilia Clivati, Luigi Santamaria Amato, Valentina Di Sarno, Anna Tampellini, Alberto Mura, Roberto Ricci, Federico Perini, Pasquale Maddaloni, Mauro Nanni, Roberto Ambrosini, Roberto Aiello, Claudio Bortolotti, Mauro Roma, Giuseppe Maccaferri, Matteo Stagni, Filippo Levi, Monia Negusini, Paolo De Natale, Giuseppe Bianco, and Davide Calonico "A 1800-km optical fiber link for metrology, geodesy, and clock comparison", Proc. SPIE 11296, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II, 112961X (25 February 2020); https://doi.org/10.1117/12.2544970

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KEYWORDS

Geodesy

Metrology

Optical fibers

Clocks

Hydrogen

Time metrology

Physics

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