Browsing by Author "Kartner, F. X."
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Item Open Access Demonstration of a cavity-enhanced optical parametric chirped-pulse amplification system(Optical Society of America, 2011-03-28) Siddiqui, A.; Hong, K. H.; Moses, J.; Chen, J.; Ilday, F. O.; Kartner, F. X.The use of a low finesse enhancement cavity resonant with a low average power (< 1W) and a high repetition rate (78MHz) pump source is shown to achieve 55% conversion efficiency into signal and idler from the coupled pump in an optical parametric process, whereas an equivalent amount of pump power in a single-pass configuration leads to negligible conversion. Careful comparison of the intracavity conversion process to the single-pass case is performed to assess the underlying impedance matching that yields the high conversion results.Item Open Access Demonstration of cavity-enhanced optical parametric chirped-pulse amplification system at high repetition rate(OSA, 2010) Siddiqui, A.; Hong, K. H.; Moses, J.; Chen, J.; İlday, Fatih Ömer; Kartner, F. X.First experimental demonstration of cavity-enhanced OPCPA at 78 MHz with <1 W of pump power is presented. For comparison, we demonstrated saturated gain in a single-pass experiment from 6-W Yb-fiber pump and Er-fiber signal sources.Item Open Access An integrated femtosecond timing distribution system for XFELS(Massachusetts Institute of Technology, 2006) Kim, J.; Burnham, J.; Chen, J.; Kartner, F. X.; İlday, Fatih Ömer; Ludwig, F.; Schlarb, H.; Winter, A.; Ferianis, M.; Cheever, D.Tightly synchronized lasers and RF-systems with timing jitter in the few femtoseconds range are necessary sub-systems for future X-ray free electron laser facilities. In this paper, we present an optical-microwave phase detector that is capable of extracting an RF-signal from an optical pulse stream without amplitude-to-phase conversion. Extraction of a microwave signal with 3 fs timing jitter (from 1 Hz to 10 MHz) from an optical pulse stream is demonstrated. Scaling of this component to subfemtosecond resolution is discussed. Together with low noise mode-locked lasers, timing-stabilized optical fiber links and compact optical cross-correlators, a flexible femtosecond timing distribution system with potentially sub-10 fs precision over distances of a few kilometers can be constructed. Experimental results on both synchronized RF and laser sources will be presented.