Title :
Laser-to-laser remote transfer and synchronization with sub-fs precision over a 3.5 km fiber link
Author :
Safak, Kemal ; Ming Xin ; Peng, Michael Y. ; Callahan, Patrick T. ; Kartner, Franz X.
Author_Institution :
Center for Free-Electron Laser Sci., Deutsches Elektronen-Synchrotron, Hamburg, Germany
Abstract :
We present recent progress made in optical, high-precision, long-term stable timing distribution systems for synchronization of next generation X-ray free-electron lasers. Timing jitter characterization of the optical master oscillator shows less than 170 as integrated jitter for frequencies above 10 kHz, limited by the detection noise floor. Timing stabilization of a 3.5-km polarization maintaining fiber link is successfully achieved with an unprecedented RMS drift of 0.18 fs over 80 hours of operation using balanced optical cross-correlation detection scheme. The output of the fiber link is used to remotely synchronize a second mode-locked laser, and continuous operation over 40 hours shows only 0.88 fs RMS drift between the two lasers under typical facility conditions.
Keywords :
X-ray lasers; free electron lasers; laser mode locking; laser stability; optical correlation; optical fibre communication; optical links; optical parametric oscillators; synchronisation; timing jitter; RMS drift; balanced optical cross-correlation detection scheme; detection noise floor; distance 3.5 km; integrated jitter; laser-to-laser remote transfer; next generation X-ray free-electron laser synchronization; optical master oscillator; polarization maintaining fiber link; remote synchronization; stable timing distribution system; subfs precision; timing jitter characterization; timing stabilization; Fiber lasers; Jitter; Laser mode locking; Optical fiber dispersion; Optical fiber polarization; Synchronization; frequency transfer; noise characterization; optical correlators; optical fiber applications; timing; timing jitter; timing transfer;
Conference_Titel :
Frequency Control Symposium (FCS), 2014 IEEE International
Conference_Location :
Taipei
DOI :
10.1109/FCS.2014.6859986
