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Two-way coherent frequency transfer in a commercial DWDM communication network in Sweden
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.ORCID iD: 0000-0003-0801-3124
Chalmers University of Technology, Sweden.
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2015 (English)In: 2015 Joint Conference of the IEEE International Frequency Control Symposium & the European Frequency and Time Forum, 2015, p. 276-279, article id 7138840Conference paper, Published paper (Refereed)
Abstract [en]

An experimental fiber link is being established between SP Technical Research Institute of Sweden in Boras and Chalmers University of Gothenburg in Sweden. The one way fiber length is about 60 km and implemented in SUNET (Swedish University Network). The aim of the project is to evaluate the signal quality when sending a stable optical frequency utilizing a wavelength in a DWDM (Dense Wavelength Division Multiplexing) system fiber pair. The experiment uses a channel in the DWDM with the wavelength of 1542.14 nm. This wavelength is within the C band and is therefore compatible with common Erbium doped amplifiers in this network. Another aim of the system is to be ultra-stable which corresponds to a stability of 1×10-13 for τ = 1 s as well as providing the ability to distribute monitored ultra-stable frequency with a future traceability to UTC (SP) (National realization of Universal Time Coordinated within Sweden) to multiple users within the network. Measurements of an optical frequency transfer using a fiber-link based on unidirectional light signals in parallel fibers have shown promising results in a free-running setup and in a lab environment. The fractional frequency stability, analyzed as the Overlapping Allan deviation, is approximately 3×10-13 at τ = 10 s and almost 1×10-14 at 105 s.

Place, publisher, year, edition, pages
2015. p. 276-279, article id 7138840
Keywords [en]
DWDM, Frequency transfer, Optical fiber, Optical fiber network
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-37677DOI: 10.1109/FCS.2015.7138840Scopus ID: 2-s2.0-84943339426ISBN: 978-1-4799-8866-2 (electronic)OAI: oai:DiVA.org:ri-37677DiVA, id: diva2:1283700
Conference
2015 Joint Conference of the IEEE International Frequency Control Symposium and the European Frequency and Time Forum (FCS 2015), April 12-16, 2015, Denver, US
Available from: 2019-01-29 Created: 2019-01-29 Last updated: 2019-07-12Bibliographically approved

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Hedekvist, Per Olof

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