First Prototype of an Optical Cross-correlation Based Fiber-link Stabilization for the Flash Synchronization System
نویسندگان
چکیده
A drift free synchronization distribution system with femtosecond accuracy is of great interest for free-electronlasers such as FLASH or the European XFEL. Stability at that level can be reached by distributing laser pulses from a mode-locked erbium-doped fiber laser master oscillator over actively optical-length stabilized fiber-links. In this paper we present a prototype of a fiber-link stabilization system based on balanced optical cross-correlation. The optical cross-correlation offers drift-free timing jitter detection. With this approach we were able to reduce the timing jitter added by a 400 m long fiber-link installed in a noisy accelerator environment to below 10 fs (rms) over 12 hours.
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