In this work, we demonstrate for the first time that it is possible to transfer simultaneously an ultra-stable optical frequency and precise and accurate timing over 540 km using a public telecommunication optical fiber network with Internet data. The optical phase is used to carry both the frequency information and the timestamps by modulating a very narrow optical carrier at 1.55 μm with spread spectrum signals using two-way satellite time transfer modems. The results in terms of absolute time accuracy (250 ps) and long-term timing stability (20 ps) well outperform the conventional Global Navigation Satellite System or geostationary transfer methods. © 2012 The Author(s). References.:.
CITATION STYLE
Lopez, O., Kanj, A., Pottie, P. E., Rovera, D., Achkar, J., Chardonnet, C., … Santarelli, G. (2013). Simultaneous remote transfer of accurate timing and optical frequency over a public fiber network. Applied Physics B: Lasers and Optics, 110(1), 3–6. https://doi.org/10.1007/s00340-012-5241-0
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