National infrastructure for dissemination of precise time and interconnection of quantum sources of ultra-stable optical frequency CITAF

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985882%3A_____%2F22%3A00567905" target="_blank" >RIV/67985882:_____/22:00567905 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68081731:_____/22:00567905 RIV/63839172:_____/22:10133523

Výsledek na webu

<a href="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" target="_blank" >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</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2663805" target="_blank" >10.1117/12.2663805</a>

Jazyk výsledku

angličtina

Název v původním jazyce

National infrastructure for dissemination of precise time and interconnection of quantum sources of ultra-stable optical frequency CITAF

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

National infrastructure for dissemination of precise time and interconnection of quantum sources of ultra-stable optical frequency CITAF

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20203 - Telecommunications

Projekt

<a href="/cs/project/LM2018140" target="_blank" >LM2018140: e-Infrastruktura CZ</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

22nd Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics

ISBN

978-1-5106-6112-7

ISSN

0277-786X

e-ISSN

1996-756X

Počet stran výsledku

6

Strana od-do

"Roč. 12502 (2022)"

Název nakladatele

SPIE

Místo vydání

Bellingham

Místo konání akce

Wojanów

Datum konání akce

5. 9. 2022

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

000920988700026