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National infrastructure for dissemination of precise time and interconnection of quantum sources of ultra-stable optical frequency CITAF
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SYSNO ASEP 0567905 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title National infrastructure for dissemination of precise time and interconnection of quantum sources of ultra-stable optical frequency CITAF Author(s) Vojtěch, J. (CZ)
Havliš, O. (CZ)
Šlapák, M. (CZ)
Altmannová, L. (CZ)
Smotlacha, V. (CZ)
Pospíšil, P. (CZ)
Kundrát, J. (CZ)
Vohnout, R. (CZ)
Velc, R. (CZ)
Andriantsarazo, E. (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 18 Article number 125020R Source Title 22nd Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics. - Bellingham : SPIE, 2022 / Masajada J. ; Urbańczyk W. - ISSN 0277-786X - ISBN 978-1-5106-6112-7 Pages roč. 12502 (2022) Number of pages 6 s. Publication form Online - E Action Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics /22./ Event date 05.09.2022 - 09.09.2022 VEvent location Wojanów Country PL - Poland Event type EUR 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 Research Infrastructure e-INFRA CZ - 90140 - CESNET, zájmové sdružení právnických osob Institutional support UPT-D - RVO:68081731 ; URE-Y - RVO:67985882 UT WOS 000920988700026 EID SCOPUS 85145347022 DOI 10.1117/12.2663805 Annotation Precise Time and Frequency dissemination and its essential infrastructure on national or even international level are being focused recently. We present here the situation in Czechia, our strategy and approach to contribute with experience of non-commercial solution, open activity utilizing optical networks shared with other data traffic. The cost efficient solution of accurate time and very stable frequency is realized, and operated within shared spectrum of CESNET network infrastructure, the costs are under control then. We are focused on future developments, plans, upgrades concerning wavelength bands and geographic solutions and extensions. Bidirectional dark channels on various wavebands, we do realize them to utilize shared leased fibres, bidirectional compensation of the fibre losses is the benefit or must for these solutions. When operating precise Time and Frequency, single path with bidirectional amplification performed by optical amplifiers is preferred, however it is sensitive to feedbacks by fibre line, caused mainly by back scattering, reflections, and potential to cause unwanted oscillations. The interference with parallel data transmissions is the issue being carefully solved. Within this paper, we also briefly mention CLONETS Design Study project where we share the experience, and the consortium is about to plan and realize the coherent Pan-European Time and Frequency dissemination network to interconnect national research network, and to provide various Time and Frequency services for a wide range of users, research, non-commercial and commercial as well. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2023 Electronic address https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12502/2663805/National-infrastructure-for-dissemination-of-precise-time-and-interconnection-of/10.1117/12.2663805.short
Number of the records: 1