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@inproceedings{feng:ipac2021-thpab314, author = {L. Feng and C.L. Li and B. Liu and J.G. Wang and X.T. Wang and W.Y. Zhang}, title = {{Development of the Femtosecond Timing Distribution System for the Shanghai Soft X-Ray Free Electron Laser}}, booktitle = {Proc. IPAC'21}, pages = {4406--4408}, eid = {THPAB314}, language = {english}, keywords = {FEL, timing, laser, FEM, experiment}, venue = {Campinas, SP, Brazil}, series = {International Particle Accelerator Conference}, number = {12}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {08}, year = {2021}, issn = {2673-5490}, isbn = {978-3-95450-214-1}, doi = {10.18429/JACoW-IPAC2021-THPAB314}, url = {https://jacow.org/ipac2021/papers/thpab314.pdf}, note = {https://doi.org/10.18429/JACoW-IPAC2021-THPAB314}, abstract = {{High accuracy timing and synchronization system on femtosecond timescale play an important role for free-electron laser projects such as Shanghai Soft X-ray free-electron laser facility (SXFEL), and future Shanghai high repetition rate XFEL and Extreme light facility (SHINE). To meet the high precision synchronization requirements for both facilities, an optical-based timing distribution system is absolutely necessary. Such a system distributes the laser pulse train from a locked optical master oscillator through the fiber links, which stabilized by a balance optical cross-correlator based on a periodical-poled KTiOPO4 crystal. In this paper, the recent progress and experimental results of SXFEL and SHINE timing distribution system will be reported.}}, }