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arXiv · 1209.4715

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

Olivier Lopez·Amale Kanj·Paul-Eric Pottie·Giovanni D. Rovera·Joseph Achkar·Christian Chardonnet·Anne Amy-Klein·Giorgio Santarelli
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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 $μ$m 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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Olivier Lopez, Amale Kanj, Paul-Eric Pottie, Giovanni D. Rovera, Joseph Achkar, Christian Chardonnet, Anne Amy-Klein, Giorgio Santarelli. 2012-10-04. Simultaneous remote transfer of accurate timing and optical frequency over a public fiber network. https://doi.org/10.1007/s00340-012-5241-0

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