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TY - CONF AU - Janas, E. AU - Czuba, K. AU - Czwalinna, M.K. AU - Felber, M. AU - Kownacki, P. AU - Lamb, T. AU - Schlarb, H. AU - Schulz, S. AU - Sikora, D. AU - Sydlo, C. AU - Szewiński, J. AU - Titberidze, M. AU - Zummack, F. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - Design and Integration of the Optical Reference Module at 1.3 GHz for FLASH and the European XFEL J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - In this paper we present recent progress on the integration and implementation of the optical reference module (REFM-OPT) for the free-electron lasers FLASH and European XFEL. In order to achieve high energy stability and low arrival time jitter of the electron beam, the accelerator requires an accurate low-level RF (LLRF) field regulation and a sophisticated synchronization scheme for various devices along the facility. The REFM-OPT is a 19” module which is responsible for resynchronizing the 1.3 GHz reference signal for the LLRF distributed by coaxial cables to a phase-stable signal of the optical synchronization system. The module provides a 1.3 GHz output signal with low phase noise and high long-term stability. Several sub-components of the REFM-OPT designed specifically for this module are described in detail. The readout electronics of the high-precision Laser-to-RF phase detector are presented as well as the integration of this key component into the 19” module. Additionally, we focus on design solutions which assure phase stability and synchronization of the 1.3 GHz signal at several high power outputs of the module. PB - JACoW CP - Geneva, Switzerland SP - 2768 EP - 2770 KW - electronics KW - laser KW - detector KW - controls KW - LLRF DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-WEPRI115 UR - http://jacow.org/ipac2014/papers/wepri115.pdf ER -