TY - CPAPER AU - Janas, E. AU - Czuba, K. AU - Felber, M. AU - Heuer, M. AU - Mavrič, U. AU - Schlarb, H. TI - MTCA.4 Phase Detector for Femtosecond-Precision Laser Synchronization J2 - Proc. of FEL2015 AB - For time-resolved experiments at FELs such as the European XFEL an accurate synchronization of the machine is essential. The required femtosecond- level synchronization we plan to achieve with an optical synchronization system, in which an inherent part is the master laser oscillator (MLO) locked to the electrical reference. At DESY we develop a custom rear transition module in MTCA.4 standard, which will allow for different techniques of phase detection between the optical and the electrical signal, as well as locking to an optical reference using a cross-correlator. In this paper we present the current status of the development, including two basic solutions for the detection to an RF. One of the methods incorporates an external drift free detector based on the so-called MZI setup. The other one employs the currently used downconverter scheme with subsequent improvements. The module can serve for locking a variety of lasers with different repetition rates. PB - JACoW CY - Geneva, Switzerland SP - 474 EP - 477 KW - laser KW - detector KW - controls KW - timing KW - experiment DA - 2015/12 PY - 2015 SN - 978-3-95450-134-2 DO - 10.18429/JACoW-FEL2015-TUP045 UR - http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/tup045.pdf ER -