National Infrastructure for Dissemination of Precise Time and Ultra-stable Optical Frequency also Aiming to Connect Quantum Sources: CITAF

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985882%3A_____%2F23%3A00575210" target="_blank" >RIV/67985882:_____/23:00575210 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68081731:_____/23:00575210 RIV/68407700:21230/23:00367140 RIV/63839172:_____/23:10133634

Výsledek na webu

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

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2665497" target="_blank" >10.1117/12.2665497</a>

Jazyk výsledku

angličtina

Název v původním jazyce

National Infrastructure for Dissemination of Precise Time and Ultra-stable Optical Frequency also Aiming to Connect Quantum Sources: CITAF

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

National Infrastructure for Dissemination of Precise Time and Ultra-stable Optical Frequency also Aiming to Connect Quantum Sources: CITAF

Popis výsledku anglicky

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.

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

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

Quantum Optics and Photon Counting 2023

ISBN

978-1-5106-6260-5

ISSN

0277-786X

e-ISSN

—

Počet stran výsledku

6

Strana od-do

(2023)

Název nakladatele

SPIE

Místo vydání

Bellingham

Místo konání akce

Prague

Datum konání akce

26. 4. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

001023007300002