A technique for determining the topological charge of supercontinuum optical vortices is presented. Spatial dispersion is compensated with a unique double-pass arrangement, and charge is consistently measured across a wide range of colors by observing diffraction through a triangular aperture.
© 2012 OSA
M. E. Anderson, H. Bigman, L. E. de Araujo, and J. L. Chaloupka, "Measuring the topological charge of ultra-broadband, optical-vortex beams with a triangular aperture," in Frontiers in Optics 2012/Laser Science XXVIII, OSA Technical Digest (online) (Optical Society of America, 2012), paper FTu3A.19.
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