Large timing infrastructure with sub ns precision in Czech Republic, with integration of vibrationsensing

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F25%3A00647786" target="_blank" >RIV/68081731:_____/25:00647786 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Large timing infrastructure with sub ns precision in Czech Republic, with integration of vibrationsensing
Original language description
The distribution of ultra‑precise time and phase‑coherent optical frequency over dedicated fibers or “dark” channels in Dense Wavelength Division Multiplexing (DWDM) networks underpins cutting‑edge scientific research, geophysical monitoring, and emerging industrial services. By employing actively‑stabilized, phase‑coherent transfer links we achieve sub‑nanosecond timing jitter and fractional‑frequency instabilities below 10⁻¹⁸ over several hundred kilometres, while preserving the integrity of co‑existing data traffic. In this work we demonstrate that a shared dark spectrum within existing DWDM infrastructure can simultaneously support high‑precision time‑frequency dissemination and distributed vibration sensing. The same spectral allocation is used for real‑time detection of environmental nperturbations such as seismic events and structural vibrations, leveraging phase‑sensitive OTDR and polarization‑based sensing techniques.
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
LA65. Sborník příspěvků multioborové konference LASER65
ISBN
978-80-87441-37-4
ISSN
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e-ISSN
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Number of pages
4
Pages from-to
136-139
Publisher name
Ústav přístrojové techniky AV ČR
Place of publication
Brno
Event location
Kurdějov
Event date
Nov 19, 2025
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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