Measurement of orbital angular momentum of light by polygon apertures

Authors

Nestor Bareza ⋅ PH National Institute of Physics, University of the Philippines Diliman
Esmerando Escoto ⋅ PH National Institute of Physics, University of the Philippines Diliman
Nathaniel Hermosa ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

We demonstrate measurement of orbital angular momentum (OAM) of light based on the Fraunhofer diffraction pattern (FDP) formed by traversing the light through regular polygon apertures. We simulate Laguerre-Gaussian (LG) beams with different topological charge l values, in order to obtain beams with different OAM lħ values. The FDPs produced using various polygon apertures are unique, thus can also be used to quantify the OAM of LG beams. We found that LG beams with higher l values can be determined by using polygon apertures that have relatively higher number of sides. We also showed that the relative polarities of l can only be measured using apertures that have odd number of line segments since these apertures can break the quadrant symmetry in the pattern.

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Issue

2015: Proceedings of the 33rd Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2015-5A-05

Section

Photonics and Terahertz, Optics and Signal Processing

Published

2015-06-03

How to Cite

[1]

N Bareza, E Escoto, and N Hermosa, Measurement of orbital angular momentum of light by polygon apertures, Proceedings of the Samahang Pisika ng Pilipinas 33, SPP-2015-5A-05 (2015). URL: https://proceedings.spp-online.org/article/view/1137.