Abstract

Negatively chirped or nearly transform-limited output pulses can be obtained in a four-wave mixing process when one of the pump beams is negatively chirped and the other is positively chirped. Nearly transform-limited $16\mathrm{fs}$ multicolor laser pulses are obtained in a fused-silica glass plate using this method. The resulting frequency shifts and compressed multicolor sidebands are continuously tunable in wavelength by varying the crossing angle between the two input beams. Sub-$10\text{-}\mathrm{fs}$ multicolor pulses should be possible obtained using this method in the future.

© 2009 Optical Society of America

Generation of μJ multicolor femtosecond laser pulses using cascaded four-wave mixing

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