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Evaluation of time transfer units for time and frequency transfer in optical fibers utilizing a passive technique based on SONET/SDH
US Naval Observatory, USA.
US Naval Observatory, USA.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.ORCID iD: 0000-0001-7388-4175
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.ORCID iD: 0000-0002-5518-4607
2012 (English)In: 44th Annual Precise Time and Time Interval (PTTI) Systems and Applications Meeting 2012, 2012, , p. 371-376p. 371-376Conference paper, Published paper (Refereed)
Abstract [en]

The time transfer method of using passive listening and detection of SDH frame headers in fiberoptical networks has been presented earlier. Previous results, using commercialized equipment and commercial fiber-links, have shown that time transfer with a precision of the order of a few nanoseconds is possible over links with network distances exceeding 1100 km. The motivation of the work has been to develop an alternative and complementary time transfer method using existing infrastructure and to make it accessible to regular users of time keeping equipment. All previous reported experimental results were performed by SP Technical Research Institute of Sweden in commercial data communication networks in Sweden and Finland. This paper will report on the recent results from an experimental fiber test network implemented at the U.S. Naval Observatory. The fiber network is in a loop-back configuration with the two node elements in the same rack. The fiber link that connects the nodes is in an environmental chamber that allows a means to apply controlled fiber length fluctuations to the link. The performance of the Time Transfer Unit (TTU) was evaluated in this setting. This will be the first independent evaluation of the TTU equipment.

Place, publisher, year, edition, pages
2012. , p. 371-376p. 371-376
Keywords [en]
Fiber, Passive frequency transfer, Two-way
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-12528Scopus ID: 2-s2.0-84890290233Local ID: 23969ISBN: 9781627488716 (print)OAI: oai:DiVA.org:ri-12528DiVA, id: diva2:970352
Conference
44th Annual Precise Time and Time Interval (PTTI) Systems and Applications Meeting 2012; Reston, VA; United States; 26-29 Nov., 2012
Available from: 2016-09-13 Created: 2016-09-13 Last updated: 2023-06-08Bibliographically approved

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Ebenhag, Sven-ChristianJaldehag, Kenneth

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