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Proceedings Paper

Angular accelerating white light
Author(s): Angela Dudley; Christian Vetter; Alexander Szameit; Andrew Forbes
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Paper Abstract

Significant interest has been devoted to tailoring optical fields that transversely accelerate during propagation in the form of Airy, Weber and Mathieu beams. In this work, we introduce a new type of optical field that exhibits controlled angular acceleration during propagation which is achieved by superpositions of Bessel beams with non-canonical phase functions. We demonstrate these angular accelerating fields by modulating the phase and amplitude of a supercontinuum source with the use of a phase-only spatial light modulator (SLM). We illustrate that by considering only the first diffraction order when the SLM is encoded with a blazed grating, the SLM is capable of tailoring the spatial profile of broadband sources without any wavelength dependence. By digitally simulating free-space propagation on the SLM, we compare the effects of real and digital propagation on the angular rotation rates of the resulting optical fields for various wavelengths. The development of controlled angular accelerating optical fields will be useful in areas such as particle manipulation, plasma control, material processing and non-linear optics.

Paper Details

Date Published: 31 August 2015
PDF: 5 pages
Proc. SPIE 9581, Laser Beam Shaping XVI, 958104 (31 August 2015); doi: 10.1117/12.2187377
Show Author Affiliations
Angela Dudley, CSIR National Laser Ctr. (South Africa)
Univ. of the Witwatersrand (South Africa)
Christian Vetter, Friedrich-Schiller-Univ. Jena (Germany)
Alexander Szameit, Friedrich-Schiller-Univ. Jena (Germany)
Andrew Forbes, CSIR National Laser Ctr. (South Africa)
Univ. of the Witwatersrand (South Africa)

Published in SPIE Proceedings Vol. 9581:
Laser Beam Shaping XVI
Andrew Forbes; Todd E. Lizotte, Editor(s)

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