The properties of harmonic generation with temporally focused ultrashort pulses are explored both theoretically and experimentally. Analyzing the phase-matching conditions for harmonic generation we find a correspondence between temporal focusing and spatial focusing along one dimension. In particular, temporally focused pulses experience a π phase shift in passing through the temporal focus, similar to the Guoy phase shift experienced by spatially focused beams. This correspondence is confirmed by measurements of third-harmonic generation induced by temporally focused pulses.
© 2005 Optical Society of America
(110.6880) Imaging systems : Three-dimensional image acquisition
(180.5810) Microscopy : Scanning microscopy
(190.4160) Nonlinear optics : Multiharmonic generation
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
Vol. 1, Iss. 1 Virtual Journal for Biomedical Optics
Dan Oron and Yaron Silberberg, "Harmonic generation with temporally focused ultrashort pulses," J. Opt. Soc. Am. B 22, 2660-2663 (2005)