Open AccessUltrashort-pulsed truncated polychromatic Bessel-Gauss beams
Author(s) -
R. Grünwald,
Martin Böck,
Volker Kebbel,
S. Huferath,
Uwe Neumann,
G. Steinmeyer,
Gero Stibenz,
Jean-Luc Néron,
Michel Piché
Publication year - 2008
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.001077
Subject(s) - optics , axicon , bessel function , apodization , physics , point spread function , optical transfer function , aperture (computer memory) , gaussian , laser , laser beams , quantum mechanics , acoustics
Spatio-spectral and spatio-temporal transfer and intensity propagation of truncated ultrashort-pulsed Bessel-Gauss beams were investigated. Extended needle-shaped focal zones were generated using a compact setup with a reflective small-angle axicon and self-apodized truncation by an adapted aperture. Spectral maps of Bessel-Gauss beams were analyzed on the basis of higher order statistical moments. Compared to focused pulsed Gaussian beams with their spectrally dependent propagation, an ultrabroadband spatio-spectral transfer function was detected over Rayleigh ranges exceeding 10 cm. These results indicate favorable pseudo-nondiffracting characteristics not only from the point of view of spatial propagation but also with respect to the spectral and temporal stability.