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

The result's identifiers

  • 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>

Alternative languages

  • 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

Classification

  • Type

    D - Article in proceedings

  • CEP classification

  • OECD FORD branch

    20202 - Communication engineering and systems

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2022

  • Confidentiality

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

Data specific for result type

  • 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