Abstract
Full characterization of the electric field amplitude and shape of an ultrashort optical pulse is important for a number of fields of research, such as high-field atomic and plasma physics, and the generation of ultrashort-pulse XUV and soft x-ray radiation. We have used the technique of frequency-resolved optical gating (FROG) to characterize low-energy pulses as short as 13 fs duration, and high peak-power pulses as short as 25 fs. We discuss experimental considerations for implementing FROG for very short pulses, and the limitations of the technique.
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