Abstract

By focusing a high repetition rate (50kHz), compact, femtosecond laser system with low pulse energy (25μJ) using a tight-focusing geometry, we demonstrate fully phase matched high-order harmonic generation for the first time at very high repetition rates, resulting in EUV light with full spatial coherence. The result is a practical, single-box, coherent source useful for applications in metrology, ultrafast spectroscopy, imaging and microscopy. The soft x-ray flux can be improved further by increasing the laser pulse energy and/or repetition rate.

© 2009 OSA

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History
Original Manuscript: June 26, 2009
Manuscript Accepted: September 1, 2009
Revised Manuscript: August 14, 2009
Published: September 15, 2009

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Author Affiliations

M.-C. Chen, M. R. Gerrity, T. Popmintchev, X. Zhou, P. Arpin, H. C. Kapteyn, M. M. Murnane

Department of Physics and JILA, University of Colorado and National Institute of Standards and Technology, Boulder, Colorado, 80309-0440

S. Backus, X. Zhang

Kapteyn-Murnane Labs Inc., Boulder, CO 80301, USA

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