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Proceedings Paper

Measuring OAM states of vortex beams with a sectorial screen
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Paper Abstract

We demonstrate a new method to detect the vortex beams carrying orbital angular momentum (OAM) by a sectorial screen. When the sectorial screen is illuminated with vortex beams, the far-field diffraction pattern can be used to define the modulus and sign of topological charges. The number of the petals denotes the number of topological charge. The direction of intensity pattern flip by 180° for a change in the sign of topological charge. The experimental results agree well with the simulated results.

Paper Details

Date Published: 27 September 2016
PDF: 6 pages
Proc. SPIE 9950, Laser Beam Shaping XVII, 99500Q (27 September 2016); doi: 10.1117/12.2235855
Show Author Affiliations
Ruishan Chen, Univ. of Science and Technology of China (China)
Xiaoqiang Zhang, Univ. of Science and Technology of China (China)
Yong Zhou, Univ. of Science and Technology of China (China)
Anting Wang, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 9950:
Laser Beam Shaping XVII
Andrew Forbes; Todd E. Lizotte, Editor(s)

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