
1.Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron, 22607 Hamburg, Germany
2.Department of Physics, University of Hamburg and the Hamburg Center for Ultrafast Imaging, 22761 Hamburg, Germany
3.Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
M Xin, Email: ming.xin@cfel.de
FX Kärtner, Email: franz.kaertner@cfel.de
Published:2017-03,
Published Online:11 July 2016,
Received:26 April 2016,
Revised:05 July 2016,
Accepted:07 July 2016
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Xin, M. et al. Attosecond precision multi-kilometer laser-microwave network. Light: Science & Applications, 6, e16187 (2017).
Xin, M. et al. Attosecond precision multi-kilometer laser-microwave network. Light: Science & Applications, 6, e16187 (2017). DOI: 10.1038/lsa.2016.187.
Synchronous laser-microwave networks delivering attosecond timing precision are highly desirable in many advanced applications
such as geodesy
very-long-baseline interferometry
high-precision navigation and multi-telescope arrays. In particular
rapidly expanding photon-science facilities like X-ray free-electron lasers and intense laser beamlines require system-wide attosecond-level synchronization of dozens of optical and microwave signals up to kilometer distances. Once equipped with such precision
these facilities will initiate radically new science by shedding light on molecular and atomic processes happening on the attosecond timescale
such as intramolecular charge transfer
Auger processes and their impacts on X-ray imaging. Here we present for the first time a complete synchronous laser-microwave network with attosecond precision
which is achieved through new metrological devices and careful balancing of fiber nonlinearities and fundamental noise contributions. We demonstrate timing stabilization of a 4.7-km fiber network and remote optical–optical synchronization across a 3.5-km fiber link with an overall timing jitter of 580 and 680 attoseconds root-mean-square
respectively
for over 40 h. Ultimately
we realize a complete laser-microwave network with 950-attosecond timing jitter for 18 h. This work can enable next-generation attosecond photon-science facilities to revolutionize many research fields from structural biology to material science and chemistry to fundamental physics.
attosecond photonicsattosecond timing metrologyhard-X-ray free-electron laserlaser-microwave networktiming distribution
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