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Attosecond precision multi-kilometer laser-microwave network.

Ming Xin1, Kemal Şafak1,2, Michael Y Peng3

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Summary
This summary is machine-generated.

Scientists developed a precise laser-microwave network for attosecond timing synchronization. This breakthrough enables advanced photon-science facilities to study ultrafast molecular and atomic processes with unprecedented accuracy.

Keywords:
attosecond photonicsattosecond timing metrologyhard-X-ray free-electron laserlaser-microwave networktiming distribution

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Area of Science:

  • Physics
  • Metrology
  • Photon Science

Background:

  • Attosecond timing precision is crucial for advanced applications like geodesy and photon-science facilities.
  • Existing systems face challenges in synchronizing multiple signals over long distances with attosecond accuracy.

Purpose of the Study:

  • To present the first complete synchronous laser-microwave network with attosecond precision.
  • To enable next-generation photon-science facilities for studying ultrafast phenomena.

Main Methods:

  • Developed new metrological devices for precise timing.
  • Carefully balanced fiber nonlinearities and fundamental noise contributions.
  • Demonstrated timing stabilization and remote optical-optical synchronization over fiber links.

Main Results:

  • Achieved timing stabilization of a 4.7-km fiber network with 580 attoseconds root-mean-square (RMS) jitter.
  • Demonstrated remote optical-optical synchronization over a 3.5-km fiber link with 680 attoseconds RMS jitter.
  • Realized a complete laser-microwave network with 950 attoseconds RMS jitter for 18 hours.

Conclusions:

  • The developed network achieves unprecedented attosecond timing precision.
  • This technology is essential for advancing research at X-ray free-electron lasers and other photon-science facilities.
  • Enables revolutionary studies in structural biology, material science, chemistry, and fundamental physics.