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TY - CONF AU - Müller, J.M. AU - Czwalinna, M.K. AU - Felber, M. AU - Schlarb, H. AU - Schmidt, B. AU - Schulz, S. AU - Schäfer, M. AU - Sydlo, C. AU - Zummack, F. ED - Henderson, Stuart ED - Akers, Evelyn ED - Satogata, Todd ED - Schaa, Volker R.W. TI - All-Optical Synchronization of Pulsed Laser Systems at FLASH and XFEL J2 - Proc. of IPAC2015, Richmond, VA, USA, May 3-8, 2015 C1 - Richmond, VA, USA T2 - International Particle Accelerator Conference T3 - 6 LA - english AB - The all-optical laser synchronization at FLASH and XFEL provides femtosecond-stable timing of the FEL X-ray photon pulses and associated optical laser pulses (photo-injector laser, seed laser, pump-probe laser, etc.). Based on a two-color balanced optical cross-correlation scheme a high-precision measure of the laser pulse arrival time is delivered, which is used for diagnostic purposes as well as for the active stabilization of the laser systems. In this paper, we present the latest installations of our all-optical synchronization systems at FLASH and the recent developments for the upcoming European XFEL that will ensure a reliable femtosecond-stable timing of FEL and related pulsed laser systems. PB - JACoW CP - Geneva, Switzerland SP - 854 EP - 856 KW - laser KW - timing KW - LLRF KW - FEL KW - controls DA - 2015/06 PY - 2015 SN - 978-3-95450-168-7 DO - 10.18429/JACoW-IPAC2015-MOPHA032 UR - http://jacow.org/ipac2015/papers/mopha032.pdf ER -