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Proceedings Paper

Spectral anomaly of ultrashort vortex pulses with axially oscillating twist
Author(s): M. Liebmann; A. Treffer; M. Bock; T. Seiler; T. Elsässer; R. Grunwald
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Paper Abstract

Spatially resolved spectroscopy of vortex beams is able to test the state of optical systems, to decode specific information or to sensitively indicate light-matter interactions. Spectral maps of ultrashort vortex pulses generated by hybrid diffractive-reflective spiral phase plates were studied experimentally and theoretically. Local spectral maps were detected by high-resolution scanning with a fiber-coupled spectrometer. Distributions of spectral centers of gravity and second moments were analyzed for femtosecond pulses. Gouy rotation of characteristic spectral features in the proximity of a phase singularity as a function of propagation distance was indicated in the spectral domain. Angular rotation was found to be modulated by weak oscillations. Analysis of spectral meta-moments indicates a fast switching and twisting behavior of spatial chirp.

Paper Details

Date Published: 22 February 2018
PDF: 7 pages
Proc. SPIE 10549, Complex Light and Optical Forces XII, 105490F (22 February 2018); doi: 10.1117/12.2287369
Show Author Affiliations
M. Liebmann, Max Born Institute for Nonlinear Optics and Short-Pulse Spectroscopy (Germany)
A. Treffer, Max Born Institute for Nonlinear Optics and Short-Pulse Spectroscopy (Germany)
M. Bock, Max Born Institute for Nonlinear Optics and Short-Pulse Spectroscopy (Germany)
T. Seiler, FernUniv. in Hagen (Germany)
T. Elsässer, Max Born Institute for Nonlinear Optics and Short-Pulse Spectroscopy (Germany)
R. Grunwald, Max Born Institute for Nonlinear Optics and Short-Pulse Spectroscopy (Germany)


Published in SPIE Proceedings Vol. 10549:
Complex Light and Optical Forces XII
Enrique J. Galvez; David L. Andrews; Jesper Glückstad, Editor(s)

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