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Phase retrieval and reconstruction of coherent synthesis by genetic algorithm
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Phase retrieval and reconstruction of coherent synthesis by genetic algorithm
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Journal Article
Phase retrieval and reconstruction of coherent synthesis by genetic algorithm
2022
Overview
In the context of diffractive optics, phase retrieval is a heavily investigated process of recreating an entire complex electric field from partial amplitude-only information through iterative algorithms. However, existing methods can fall into local minima during reconstructions or struggle to recover unusual and novel electric field distributions. We present a numerical method based on a global-optimization genetic algorithm that reconstructs non-trivial electric field distributions from single diffracted intensity distributions. Diffraction and propagation of the optical fields over arbitrary distances is modeled through implementation of the angular spectrum technique. Additionally, a coherently-locked laser array system is used as an experimental case-study demonstrating 0.09 π phase reconstruction accuracy of initial laser parameters from single intensity images.
Publisher
IOP Publishing
