National Infrastructure for Dissemination of Precise time and Interconnection of Quantum sources of ultra-stable optical frequency CITAF

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F22%3A00367139" target="_blank" >RIV/68407700:21230/22:00367139 - isvavai.cz</a>

Result on the web

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

DOI - Digital Object Identifier

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

Result language

angličtina

Original language name

National Infrastructure for Dissemination of Precise time and Interconnection of Quantum sources of ultra-stable optical frequency CITAF

Original language description

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.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20202 - Communication engineering and systems

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

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

Article name in the collection

Proc. SPIE 12502, 22nd Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics

ISBN

978-1-5106-6111-0

ISSN

0277-786X

e-ISSN

1996-756X

Number of pages

6

Pages from-to

—

Publisher name

SPIE

Place of publication

Bellingham (stát Washington)

Event location

Wojanów

Event date

Sep 5, 2022

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000920988700026