Simultaneous remote transfer of accurate timing and optical frequency over a public fiber network

Abstract : In this work we demonstrate for the first time that it is possible to transfer simultaneously an ultra-stable optical frequency and a precise and accurate timing over 540 km using a public telecommunication optical fiber networks 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 term 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.
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Applied Physics B - Laser and Optics, Springer Verlag, 2013, 110 (1), pp.3-6. 〈10.1007/s00340-012-5241-0〉
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Olivier Lopez, Amale Kanj, Paul-Eric Pottie, Giovanni D. Rovera, Joseph Achkar, et al.. Simultaneous remote transfer of accurate timing and optical frequency over a public fiber network. Applied Physics B - Laser and Optics, Springer Verlag, 2013, 110 (1), pp.3-6. 〈10.1007/s00340-012-5241-0〉. 〈hal-00734103v2〉

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