ABSTRACT
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.
ABSTRACT
A tunable 1-kHz repetition-rate regenerative Ti:sapphire amplifier system is used to produce 200-fs vacuum-ultraviolet pulses in the range of 172.7-187 nm by phase-matched sum-frequency mixing in lithium triborate of the Ti:sapphire's fourth harmonic and a parametrically generated infrared pulse.
ABSTRACT
170-fs, 0.8-microJ optical pulses at 193 nm generated by frequency quadrupling of high-power Ti:sapphire laser pulses are amplified in an ArF gain module. Double-pass amplification at a 400-Hz repetition rate resulted in 290-mW average power with pulse durations of ~ 300 fs.
ABSTRACT
We measured the transmission of MgF(2), CaF(2), BaF(2), and fused-silica window materials, using 0.8-ps optical pulses at 193 nm with intensities from 1 to 300 GW/cm(2). The two-photon absorption coefficients beta are extracted from these measurements. The excited excitonic fluorescence in CaF(2) and BaF(2) shows a quadratic dependence on the irradiation intensity in a wide range.
ABSTRACT
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.