National Infrastructure for Dissemination of Precise Time and Coherent Ultra-stable Op-tical Frequency - CITAF

Josef Vojtech, Vladimir Smotlacha, Ondrej Havlis, Martin Slapak, Lada Altmannova, Jan Kundrat, Sarbojeet Bhowmick, Rudolf Vohnout, Radek Velc, Petr Pospisil, Martin Cizek, Jan Hrabina, Simon Rerucha, Lenka Pravdova, Josef Lazar, Ondrej Cip, Alexander Kuna, Jaroslav Roztocil

Abstract:	In the article, we introduce the Czech Infrastructure for Time and Frequency activity which is a non-commercial, open activity focused on the transfer of accurate time and very stable frequency using optical networks. The national optical infrastructure for time and frequency transfer is operated on top of the CESNET network infrastructure, to have operational costs under control. We briefly summarize the history of its development, together with the used types of optical transfer and its stabilization. We also address running and planned upgrades and future development plans regarding wavelength bands and considered geographic extensions.
Published in:	Proceedings of the 53rd Annual Precise Time and Time Interval Systems and Applications Meeting January 25 - 27, 2022 Hyatt Regency Long Beach Long Beach, California
Pages:	235 - 242
Cite this article:	Vojtech, Josef, Smotlacha, Vladimir, Havlis, Ondrej, Slapak, Martin, Altmannova, Lada, Kundrat, Jan, Bhowmick, Sarbojeet, Vohnout, Rudolf, Velc, Radek, Pospisil, Petr, Cizek, Martin, Hrabina, Jan, Rerucha, Simon, Pravdova, Lenka, Lazar, Josef, Cip, Ondrej, Kuna, Alexander, Roztocil, Jaroslav, "National Infrastructure for Dissemination of Precise Time and Coherent Ultra-stable Op-tical Frequency - CITAF," Proceedings of the 53rd Annual Precise Time and Time Interval Systems and Applications Meeting, Long Beach, California, January 2022, pp. 235-242. https://doi.org/10.33012/2022.18289
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