Intense femtosecond extreme ultraviolet pulses by using a time-delay-compensated monochromator

Extreme-ultraviolet pulses, produced by high-order harmonic generation, have been spectrally selected by a time-delay-compensated grating monochromator. Temporal characterization of the harmonic pulses has been obtained using cross-correlation method: pulses as short as 8 fs, with high photon flux, have been measured at the output of the monochromator. (c) 2007 Optical Society of America.