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Breaking the Femtosecond Barrier in Multi-km Timing Synchronization Systems
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机译:打破多公里定时同步系统中的飞秒障碍
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摘要
To observe electronic dynamics in atoms, molecules, and condensed matter taking place on an attosecond time scale, next-generation photon science facilities like X-ray free-electronlasers and intense laser beamlines require system-wide attosecondlevel synchronization of dozens of optical andmicrowave signals up to kilometer distances. Here, we present for the first time a timing synchronization system that can meet the strict timing requirements of such large-scale facilities. We discuss some key enabling technologies including master-laser jitter characterization, local timing synchronization, new designs of attosecond-precision timing/phase detectors, and analyze fundamental noise contributions in nonlinear pulse propagation in fiber links. Finally, a complete 4.7-km laser-microwave network with 950-as timing jitter is realized over tens of hours of continuous operation.
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