Abstract
Femtosecond X-ray pulses generated by free-electron lasers provide substantial scientific potential for time-resolved experiments. Accurate timing synchronization on the femtosecond scale is an essential installation. To date, the required precision levels can only be achieved by a laser-based synchronization system. A train of sub-picosecond pulses from a mode-locked laser is distributed over actively length-stabilized optical fiber links to an arbitrary number of remote locations which can be kilometers away. These optical fibers have inherently low loss and are immune against any form of electromagnetic interference. The deployed mode-locked laser has to be phase-locked to the master oscillator of the facility, and the distributed optical pulses are used in turn to phase-lock slave laser systems by all-optical schemes. Additionally, distributed low-level RF signals are restabilized at various locations throughout the accelerator. For the phase-locking of RF signals versus optical pulses, a stable and drift-free scheme is established.
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Sydlo, C., Müller, J., Schlarb, H. (2019). Synchronization of FEL Components with Fiber Laser Techniques. In: Jaeschke, E., Khan, S., Schneider, J., Hastings, J. (eds) Synchrotron Light Sources and Free-Electron Lasers. Springer, Cham. https://doi.org/10.1007/978-3-319-04507-8_80-1
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DOI: https://doi.org/10.1007/978-3-319-04507-8_80-1
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