High-brightness high-order harmonic generation by truncated bessel beams in the sub-10-fs regime

Phys Rev Lett. 2002 Jan 21;88(3):033902. doi: 10.1103/PhysRevLett.88.033902. Epub 2002 Jan 2.

Abstract

Low-divergence, high-brightness harmonic emission has been generated by using a fundamental beam with a truncated Bessel intensity profile. Such a beam is directly obtained by using the hollow-fiber compression technique, which indeed allows one to optimize both temporal and spatial characteristics of the high-order harmonic generation process. This is particularly important for the applications of radiation, where extreme temporal resolution and high brightness are required.