All fiber-coupled, long-term stable timing distribution for free-electron 
lasers with few-femtosecond jitter

Şafak, Kemal; Xin, M.; Callahan, P. T.; Peng, M. Y.; Kärtner, F. X.

doi:10.1063/1.4922747

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All fiber-coupled, long-term stable timing distribution for free-electron lasers with few-femtosecond jitter

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Şafak, Kemal
International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron, Notkestrasse 85, Hamburg 22607, Germany;
Physics Department, University of Hamburg and the Hamburg Center for Ultrafast Imaging, Luruper Chaussee 149, Hamburg 22761, Germany;

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Citation

Şafak, K., Xin, M., Callahan, P. T., Peng, M. Y., & Kärtner, F. X. (2015). All fiber-coupled, long-term stable timing distribution for free-electron lasers with few-femtosecond jitter. Structural Dynamics, 2(4): 041715. doi:10.1063/1.4922747.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002A-5F40-A

Abstract

We report recent progress made in a complete fiber-optic, high-precision, long-term stable timing distribution system for synchronization of next generation X-ray free-electron lasers. Timing jitter characterization of the master laser shows less than 170-as RMS integrated jitter for frequencies above 10 kHz, limited by the detection noise floor. Timing stabilization of a 3.5-km polarization-maintaining fiber link is successfully achieved with an RMS drift of 3.3 fs over 200 h of operation using all fiber-coupled elements. This all fiber-optic implementation will greatly reduce the complexity of optical alignment in timing distribution systems and improve the overall mechanical and timing stability of the system.