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National Infrastructure for Dissemination of Precise Time and Ultra-stable Optical Frequency also Aiming to Connect Quantum Sources: CITAF
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SYSNO ASEP 0575210 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title National Infrastructure for Dissemination of Precise Time and Ultra-stable Optical Frequency also Aiming to Connect Quantum Sources: CITAF Author(s) Vojtěch, J. (CZ)
Smotlacha, V. (CZ)
Havliš, O. (CZ)
Vohnout, R. (CZ)
Špaček, M. (CZ)
Novák, T. (CZ)
Andriantsarazo, E. (CZ)
Šlapák, M. (CZ)
Altmannová, L. (CZ)
Velc, R. (CZ)
Pospíšil, P. (CZ)
Kundrát, J. (CZ)
Čížek, Martin (UPT-D) RID, ORCID, SAI
Hrabina, Jan (UPT-D) RID, ORCID, SAI
Řeřucha, Šimon (UPT-D) RID, ORCID, SAI
Pravdová, Lenka (UPT-D) RID, ORCID, SAI
Lazar, Josef (UPT-D) RID, ORCID, SAI
Číp, Ondřej (UPT-D) RID, SAI, ORCID
Kuna, Alexander (URE-Y) RID, RID, ORCID, SAI
Roztočil, J. (CZ)Number of authors 20 Article number 1257003 Source Title Quantum Optics and Photon Counting 2023. - Bellingham : SPIE, 2023 / Procházka I. ; Sobolewski R. - ISSN 0277-786X - ISBN 978-1-5106-6260-5 Pages (2023) Series Proceedings of SPIE Number of pages 6 s. Publication form Print - P Action Quantum Optics and Photon Counting 2023 Event date 26.04.2023 - 27.04.2023 VEvent location Prague Country CZ - Czech Republic Event type WRD Language eng - English Country US - United States Keywords precise time ; coherent optical frequency ; time metrology ; infrastructure ; optical amplification ; optical fibre ; White Rabbit Subject RIV JW - Navigation, Links, Detection ; Counter-Measures OECD category Telecommunications Subject RIV - cooperation Institute of Radio Engineering and Electronics - Navigation, Links, Detection ; Counter-Measures Institutional support UPT-D - RVO:68081731 ; URE-Y - RVO:67985882 UT WOS 001023007300002 EID SCOPUS 85170642941 DOI 10.1117/12.2665497 Annotation There has been an increased focus on precise time and frequency transmission dissemination at a national and international level recently. We would like to present the situation in the Czech Republic, our strategy, approach, and our experience with a non-commercial, cost-effective solution that utilizes shared optical networks. The presented solution provides accurate time and stable frequency at a lower operational cost, utilizing the shared spectrum of the CESNET3 network infrastructure. We are committed to future developments and upgrades that will include the next wavelength bands and geographic extensions. Additionally, we have implemented bidirectional dark channels on various wavebands, which utilize shared leased fibers and offer bidirectional compensation for fiber losses. However, operating precise time and frequency requires a single path with bidirectional amplification performed by optical amplifiers, which are sensitive to feedback from the fiber line induced by back-scattering, and reflections, and which can cause unwanted oscillations. We have addressed this issue by carefully solving the interference with parallel data transmissions. In summary, we have implemented a cost-effective solution for precise time and frequency dissemination in the Czech Republic, which utilizes shared optical networks. We are committed to future developments, and we are also part of a consortium that plans to realize a Pan-European network to offer time and frequency services to a broad range of users. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2024 Electronic address https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12570/2665497/National-infrastructure-for-dissemination-of-precise-time-and-ultra-stable/10.1117/12.2665497.short
Number of the records: 1