Contribution to the Improvement of the Correlation Filter Method for Modal Analysis with a Spatial Light Modulator

PLUTO / PLUTO-2 Spatial Light Modulators
Digital-/ Computer Holography/ CGH Higher Order Modes / Optical Vortex / OAM
Published on:
Authors: Benedicto, David; Collados, María Victoria; Martín, Juan C.; Jesus Atencia; Mendoza-Yero, Omel & Vallés, Juan A.
Abstract:
“Modal decomposition of light is essential to study its propagation properties in waveguides and photonic devices. Modal analysis can be carried out by implementing a computer-generated hologram acting as a match filter in a spatial light modulator. In this work, a series of aspects to be taken into account in order to get the most out of this method are presented, aiming to provide useful operational procedures. First of all, a method for filter size adjustment based on the standard fiber LP-mode symmetry is presented. The influence of the mode normalization in the complex amplitude encoding-inherent noise is then investigated. Finally, a robust method to measure the phase difference between modes is proposed. These procedures are tested by wavefront reconstruction in a conventional few-mode fiber.”

Open Access

Publication: Micromachines
Issue/Year: Micromachines, Volume 13; Number 11; Pages 2004; 2022
DOI: 10.3390/mi13112004
Link: https://doi.org/10.3390/mi13112004

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