Wong, F.

Paper	Title	Page
FROAC04	Sub-10 Femtosecond Stabilization of a Fiber Link Using a Balanced Optical Cross Correlator	3804
	F. Loehl J. Chen, F. X. Kaertner, J. Kim, F. Wong MIT, Cambridge, Massachusetts J. M. Mueller TUHH, Hamburg H. Schlarb DESY, Hamburg
	Synchronization of various components with fs stability is needed for the operation of free-electron-lasers such as FLASH or the European XFEL. One possibility to realize a high precision synchronization is to use a mode-locked Er-doped fiber laser as a master clock and to distribute ultra short laser pulses inside the machine using actively stabilized fiber links. In this paper we demonstrate the stabilization of a 300 m long fiber link with a self-aligned balanced cross-correlator using a single type II phase-matched PPKTP crystal. This approach allowed us to reduce the timing jitter added by the link to below 10 fs.
	Slides