High-resolution optical frequency dissemination on a telecommunication network with data traffic

Details High-resolution optical frequency dissemination on a telecommunication network with data traffic High-resolution optical frequency dissemination on a telecommunication network with data traffic

2009-02-12

arxiv.org/abs/0902.2143v1

Physics

Quantum Physics

Scientific paper

We transferred the frequency of an ultra-stable laser over a 108 km urban fiber link comprising 22 km of optical communications network fiber simultaneously carrying Internet data traffic. The metrological signal and the digital data signal are transferred on two different frequency channels in a dense wavelength division multiplexing scheme. The metrological signal is inserted into and extracted from the communications network by using bidirectional off-the-shelf optical add-drop multiplexers. The link-induced phase noise is measured and cancelled with round-trip technique using an all-fiber-based interferometer. The compensated link shows an Allan deviation of a few 10-16 at one second and below 10-19 at 10,000 seconds. This opens the way to a wide dissemination of ultra stable optical clock signals between distant laboratories via the Internet network.

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