Abstract

By excitation of cadmium vapor with a high-peak-power KrF excimer laser pulse, fluorescence of an atomic transition at λ = 508 nm is induced by a two-photon ionization process followed by fast recombination. The nonlinear response of the medium is used to develop a simple single-shot autocorrelator for subpicosecond KrF excimer laser pulses operating down to intensities of less than 10⁹W/cm.² We have measured 360-fs (FWHM) pulses at λ = 248 nm with a time resolution of 15 fs.

© 1991 Optical Society of America

Single-shot measurement of subpicosecond KrF pulse width by three-photon fluorescence of the XeF visible transition

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