Effect of soil temperature on optical frequency transfer through unidirectional dense-wavelength-division-multiplexing fiber-optic links

T.J. Pinkert, O. Boll, L. Willmann, G.S.M. Jansen, E.A. Dijck, B.G.H.M. Groeneveld, R. Smets, F.C. Bosveld, W.M.G. Ubachs, K. Jungmann, K.S.E. Eikema, J.C.J. Koelemeij

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Results of optical frequency transfer over a carrier-grade dense-wavelength-division-multiplexing (DWDM) optical fiber network are presented. The relation between soil temperature changes on a buried optical fiber and frequency changes of an optical carrier through the fiber is modeled. Soil temperatures, measured at various depths by the Royal Netherlands Meteorology Institute (KNMI) are compared with observed frequency variations through this model. A comparison of a nine-day record of optical frequency measurements through the 2 × 298 km fiber link with soil temperature data shows qualitative agreement. A soil temperature model is used to predict the link stability over longer periods (days-months-years). We show that optical frequency dissemination is sufficiently stable to distribute and compare, e.g., rubidium frequency standards over standard DWDM optical fiber networks using unidirectional fibers.
Original languageEnglish
Pages (from-to)728-738
JournalApplied Optics
Volume54
Issue number4
DOIs
Publication statusPublished - 2015

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