25 August 2009 Long-distance ultrastable frequency transfer over urban fiber link: toward a European network
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Abstract
Experiments of transmission of sub-Hz cavity-stabilized 1542 nm laser frequency using a pair of 43 km dark fibers in urban environment are reported on successively 86 km and 172 km, with fractional frequency instability in the 10-19 range. A new approach is then introduced consisting in using part of an optical telecommunications network carrying simultaneously data traffic using a DWDM scheme to multiplex the metrological signal. This method is experimentally implemented using 22 km of fiber linking Université Paris 13 to its internet access point without degradation of the link instability. We finally present a project of large scale link between Paris and the German border using RENATER network which could constitute the first step of the building of a European optical network for ultrastable frequency dissemination and comparison.
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Fabien Kéfélian, Haifeng Jiang, Olivier Lopez, Christian Chardonnet, Anne Amy-Klein, Giorgio Santarelli, "Long-distance ultrastable frequency transfer over urban fiber link: toward a European network", Proc. SPIE 7431, Time and Frequency Metrology II, 74310D (25 August 2009); doi: 10.1117/12.828273; https://doi.org/10.1117/12.828273
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