Abstract
Generation of deep-ultraviolet femtosecond pulses by four-wave mixing through filamentation in neon gas was demonstrated. Fundamental and second-harmonic pulses of Ti:sapphire amplifier output were focused into neon gas, and pulses with the center wavelength of were produced by a four-wave mixing process, through an filament. Additionally, pulses with an energy of at were generated, probably by a cascaded process, . The pulses were compressed by a grating-based compressor and characterized by a dispersion-free transient grating frequency-resolved optical gating. The estimated pulse width was .
© 2007 Optical Society of America
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