Abstract
Two-photon resonant third-order sum- and difference frequency mixing1,2 (ωvuv = 2ω1 ± ω2) in rare gases (Xe and Kr) is a powerful means for the generation of broadly tunable coherent radiation in the vacuum ultraviolet (VUV). Previous experiments provided intense VUV tunable in the wavelength range λvuv = 92 - 200 nm. In the investigations presented in this contribution the tuning range of this type of frequency conversion has been extended to wavelengths as short as 72.4 nm. This wavelength is close to the shortest which can be generated by four-wave mixing of radiation (λL > 216 nm) emitted by pulsed dye laser systems.
© 1986 Optical Society of America
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