Archivio Istituzionale della RicercaWe realized a coherent optical fiber link in Italy, with a fiber haul of 642 km. To characterize the link, we doubled the link to 1284 km, demonstrating a characterization technique based on the double round trip on a single fiber. The link is intended to significantly improve the frequency references used in radio-astronomy and precision measurements in atomic physics. The data analysis is based on the Allan deviation, whose expression is theoretically derived from the noise power spectrum. The demonstrated resolution is 3x10-19 in 1000 s and the uncertainty of the transfer is 5x10-19. The arming of a second fiber is avoided, and this could be rather beneficial to long hauls realizations for a continental fiber network for frequency and time metrology
Optical frequency transfer with a 1284 km coherent fiber link / Calonico, D.; Bertacco, E. K.; Calosso, C.; Clivati, C.; Godone, A.; Frittelli, M.; Mura, A.; Zucco, M.; Levi, F.; Costanzo, Giovanni Antonio; Poli, N.; Sutyrin, D. V.; Tino, G. M.. - ELETTRONICO. - (2014), pp. 1-4. (Intervento presentato al convegno European Frequency and Time Forum (EFTF), 2014 tenutosi a Neuchatel, Switzerland nel 23-26 June 2014) [10.1109/EFTF.2014.7331412].
Optical frequency transfer with a 1284 km coherent fiber link
COSTANZO, Giovanni Antonio;
2014
Abstract
We realized a coherent optical fiber link in Italy, with a fiber haul of 642 km. To characterize the link, we doubled the link to 1284 km, demonstrating a characterization technique based on the double round trip on a single fiber. The link is intended to significantly improve the frequency references used in radio-astronomy and precision measurements in atomic physics. The data analysis is based on the Allan deviation, whose expression is theoretically derived from the noise power spectrum. The demonstrated resolution is 3x10-19 in 1000 s and the uncertainty of the transfer is 5x10-19. The arming of a second fiber is avoided, and this could be rather beneficial to long hauls realizations for a continental fiber network for frequency and time metrology
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https://hdl.handle.net/11583/2624909
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