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

Result code in 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>

Alternative codes found

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

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20203 - Telecommunications

Project

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

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

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

Article name in the collection

Quantum Optics and Photon Counting 2023

ISBN

978-1-5106-6260-5

ISSN

0277-786X

e-ISSN

—

Number of pages

6

Pages from-to

(2023)

Publisher name

SPIE

Place of publication

Bellingham

Event location

Prague

Event date

Apr 26, 2023

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

001023007300002