Ultrashort-pulsed truncated polychromatic Bessel-Gauss beams.
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.
Grunwald
R
R
Max-Born-Institute for Nonlinear Optics and Short-Pulse Spectroscopy, Max-Born-Strasse 2A, D-12489 Berlin, Germany. grunwald@mbi-berlin.de <grunwald@mbi-berlin.de>
Bock
M
M
Kebbel
V
V
Huferath
S
S
Neumann
U
U
Steinmeyer
G
G
Stibenz
G
G
Néron
J-L
JL
Piché
M
M
D003116:Color; D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008962:Models, Theoretical; D016011:Normal Distribution; D055095:Optics and Photonics / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*