We calculated the temporal and spatial characteristics of an ultrashort laser pulse propagating through a diffractive beam-shaping system that converts a Gaussian beam into a beam with a uniform irradiance profile that was originally designed for continuous waves [Proc. SPIE 2863, 237 (1996)]. The pulse front is found to be considerably curved for a 10-fs pulse, resulting in a temporal broadening of the pulse that increases with increasing radius. The spatial intensity distribution deviates significantly from a top-hat profile, whereas the fluence shows a homogeneous radial distribution.
© 2003 Optical Society of America
[Optical Society of America ]
Shuyan Zhang, Yuhang Ren, and Gunter Lüpke, "Ultrashort Laser Pulse Beam Shaping," Appl. Opt. 42, 715-718 (2003)