Classical model of femtosecond time‐resolved absorption spectra of dissociating molecules

Generation of broadly tunable femtosecond vacuum-ultraviolet pulses

Tunable femtosecond vacuum-ultraviolet radiation in the range omega(D) = 102-124 nm has been generated by twophoton-resonant and near-resonant four-wave difference-frequency mixing (omega(D) = 2omega(p) - omega(I)) in krypton and argon by use of intense 250-fs ArF laser pulses (omega(p)) and tunable femtosecond signal and idler pulses (omega(I)) generated by an optical parametric generator.

Measurement of ultraviolet subpicosecond pulses based on ultrafast beam deflection

We describe a beam-deflection technique based on the ultrafast electronic Kerr effect for measuring the duration of ultrashort laser pulses in a wide spectral range. Using this method, which provides the third-order intensity correlation function, we have measured subpicosecond KrF laser pulses. The results are in good agreement with the Kerr-shutter autocorrelation measurement.

Efficient generation of subpicosecond seed pulses at 193 nm for amplification in ArF gain modules by frequency mixing in nonlinear optical crystals

Phase-matched sequential frequency mixing in three ,beta-barium borate crystals was used for efficient generation of subpicosecond UV pulses tunable at approximately 193 nm. Double-pass amplification of these seed pulses in a conventional ArF excimer gain module resulted in 800-fs, 1.5-mJ optical pulses.