title: High-resolution optical frequency dissemination on a telecommunications network with data traffic.
abstract: We transferred the frequency of an ultrastable laser over a 108-km-long urban fiber link comprising 22 km of an optical communications network fiber simultaneously carrying Internet data traffic. The metrological signal and the digital data signal were transferred over two different frequency channels in a dense wavelength-division multiplexing scheme. The metrological signal was inserted in and extracted from the communication network using bidirectional off-the-shelf optical add-drop multiplexers. The link-induced phase noise was measured and canceled with a round-trip technique using an all-fiber-based interferometer. The compensated link showed an Allan deviation of a few 10(-16) at 1 s and below 10(-19) at 10,000 s. This work paves the way to a wide dissemination of ultrastable optical clock signals between distant laboratories via the Internet.
authors.affiliation: Laboratoire de Physique des Lasers, CNRS, Université Paris 13, 99 Avenue J.-B. Clément, 93430 Villetaneuse, France.
authors.forename: Fabien
authors.initials: F
authors.lastname: Kéfélian
authors.forename: Olivier
authors.initials: O
authors.lastname: Lopez
authors.forename: Haifeng
authors.initials: H
authors.lastname: Jiang
authors.forename: Christian
authors.initials: C
authors.lastname: Chardonnet
authors.forename: Anne
authors.initials: A
authors.lastname: Amy-Klein
authors.forename: Giorgio
authors.initials: G
authors.lastname: Santarelli