CITAF - National Infrastructure for Dissemination of Precise Time and Ultra-stable Optical Frequency

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F63839172%3A_____%2F23%3A10133589" target="_blank" >RIV/63839172:_____/23:10133589 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

CITAF - National Infrastructure for Dissemination of Precise Time and Ultra-stable Optical Frequency

Popis výsledku v původním jazyce

National time and frequency dissemination networks are being developed in manycountries; also international connections are being established. In the contributionwe present Czech Infrastructure for Time and Frequency as a non-commercial,open activity focused on the transfer of accurate time and very stable frequencyusing optical networks. The national optical infrastructure for time and frequencytransfer is operated on top of the CESNET network infrastructure, to haveoperational cost under control. We also address actually running and plannedupgrades and future development plans regarding wavelength bands andconsidered geographic extensions. We will also focus on creation of bidirectionaldark channels on different wavebands within shared fibers together withbidirectional compensation of fiber losses. Single path bidirectional amplificationutilizing lumped optical amplifiers is sensitive to feedback from fiber line likeback scattering and reflections and in case of increased feedback can produceunwanted oscillations, which potentially interfere with parallel datatransmissions. We will also briefly mention the results and recommendations ofCLONETS-DS project, which presented design study for coherent Pan-Europeantime and frequency dissemination network, which would connect nationalnetworks and and provide different services based on time and frequency for awide range of users.

Název v anglickém jazyce

CITAF - National Infrastructure for Dissemination of Precise Time and Ultra-stable Optical Frequency

Popis výsledku anglicky

National time and frequency dissemination networks are being developed in manycountries; also international connections are being established. In the contributionwe present Czech Infrastructure for Time and Frequency as a non-commercial,open activity focused on the transfer of accurate time and very stable frequencyusing optical networks. The national optical infrastructure for time and frequencytransfer is operated on top of the CESNET network infrastructure, to haveoperational cost under control. We also address actually running and plannedupgrades and future development plans regarding wavelength bands andconsidered geographic extensions. We will also focus on creation of bidirectionaldark channels on different wavebands within shared fibers together withbidirectional compensation of fiber losses. Single path bidirectional amplificationutilizing lumped optical amplifiers is sensitive to feedback from fiber line likeback scattering and reflections and in case of increased feedback can produceunwanted oscillations, which potentially interfere with parallel datatransmissions. We will also briefly mention the results and recommendations ofCLONETS-DS project, which presented design study for coherent Pan-Europeantime and frequency dissemination network, which would connect nationalnetworks and and provide different services based on time and frequency for awide range of users.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20203 - Telecommunications

Projekt

<a href="/cs/project/LM2023054" target="_blank" >LM2023054: e-Infrastruktura CZ</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

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