Simultaneous remote transfer of accurate timing and optical frequency over a public fiber network
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.
- Simultaneous remote transfer of accurate timing and optical frequency over a public fiber network
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- Available under Open Access This content is freely available online to anyone, anywhere at any time.
Applied Physics B
Volume 110, Issue 1 , pp 3-6
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- 1. Laboratoire de Physique des Lasers, Université Paris 13, Sorbonne Paris Cité, CNRS, 99 Avenue Jean-Baptiste Clément, 93430, Villetaneuse, France
- 2. LNE-SYRTE, Observatoire de Paris, CNRS, UPMC, 61 Av. de l’Observatoire, 75014, Paris, France
- 3. Laboratoire Photonique, Numérique et Nanosciences, UMR 5298 Université de Bordeaux 1, Institut d’Optique and CNRS, 351 Cours de la Libération, 33405, Talence, France