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DOE OSTI · 1854652

Phase retrieval and reconstruction of coherent synthesis by genetic algorithm

Lemons, Randy (ORCID:0000000256080455)·Carbajo, Sergio
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Abstract

Abstract 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.

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Lemons, Randy (ORCID:0000000256080455), Carbajo, Sergio. 2022-03-14. Phase retrieval and reconstruction of coherent synthesis by genetic algorithm. https://doi.org/10.1088/2515-7647%2Fac4afd

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