Efficient reconstruction of orbital angular momentum using a diffractive mode sorter

Light Mkhumbuza; Andrew Forbes; Angela Dudley

doi:10.1117/12.3027971

1 October 2024 Efficient reconstruction of orbital angular momentum using a diffractive mode sorter

Light Mkhumbuza, Andrew Forbes, Angela Dudley

Proceedings Volume 13130, Novel Optical Systems, Methods, and Applications XXVII; 1313009 (2024) https://doi.org/10.1117/12.3027971
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

Remarkable strides have been made in the realm of efficiently sorting and analysing Orbital Angular Momentum (OAM) states of light through the application of geometric optical transformations employing mode sorters. In our study, we introduce a novel methodology that reconstructs OAM states of light through the demonstration of the reciprocity of light. This is achieved by operating a diffractive mode sorter in reverse, effecting an inverse geometric optical transformation that reverts simple lateral spots back to OAM modes of light. Our approach leveraged a Digital Micro-mirror Device (DMD) to encode a hologram, producing an array of spots mimicking the output of a traditional mode sorter. Our system is not only limited solely to the generation of scalar OAM modes, with a simple manipulation of the polarization of light we enhanced our system to encompass vector beam generation capabilities.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Light Mkhumbuza, Andrew Forbes, and Angela Dudley "Efficient reconstruction of orbital angular momentum using a diffractive mode sorter", Proc. SPIE 13130, Novel Optical Systems, Methods, and Applications XXVII, 1313009 (1 October 2024); https://doi.org/10.1117/12.3027971

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