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Proceedings Paper

Mapping the spectral twist of few-cycle vortex pulses
Author(s): M. Bock; R. Grunwald
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Paper Abstract

Spatially resolved spectroscopy of vortex beams is able to test the orbital angular momentum state of optical systems, to decode specific information or to sensitively indicate light-matter interactions. Spectral maps of ultrashort vortex pulses were studied experimentally and theoretically. Local spectra were detected by scanning with a spatially highly resolving fiber-coupled spectrometer. Characteristic distributions of spectral statistical moments were analyzed for ultra-broadband near-infrared pulses with pulse durations in few-cycle range. It is shown that the spectral moments can be used for improving the contrast of vortex recognition and localization as well as for the data transfer via orbital angular momentum maps. In combination with time-resolved wavefront data, a more complete characterization of dynamic vortices is feasible. Gouy phase effect and radial oscillatory behavior of spectral maps of vortex pulses are demonstrated. Further implications of the spatio-spectral information content for singular optics and related applications will be addressed.

Paper Details

Date Published: 4 March 2016
PDF: 7 pages
Proc. SPIE 9764, Complex Light and Optical Forces X, 97640O (4 March 2016); doi: 10.1117/12.2208023
Show Author Affiliations
M. Bock, Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (Germany)
R. Grunwald, Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (Germany)

Published in SPIE Proceedings Vol. 9764:
Complex Light and Optical Forces X
Jesper Glückstad; David L. Andrews; Enrique J. Galvez, Editor(s)

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