High-fidelity holographic beam shaping with optimal transport and phase diversity

A phase-only spatial light modulator (SLM) provides a powerful way to shape laser beams into arbitrary intensity patterns, but at the cost of a hard computational problem of determining an appropriate SLM phase. Here we show that optimal transport methods can generate approximate solutions to this p...

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Bibliographic Details
Published inarXiv.org
Main Authors Swan, Hunter, Torchylo, Andrii, Michael J Van de Graaff, Rudolph, Jan, Hogan, Jason M
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 30.08.2024
Subjects
Algorithms
Laser beams
Luminous intensity
Phase diversity
Phase retrieval
Spatial light modulators
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Summary:A phase-only spatial light modulator (SLM) provides a powerful way to shape laser beams into arbitrary intensity patterns, but at the cost of a hard computational problem of determining an appropriate SLM phase. Here we show that optimal transport methods can generate approximate solutions to this problem that serve as excellent initializations for iterative phase retrieval algorithms, yielding vortex-free solutions with superior accuracy and efficiency. Additionally, we show that analogous algorithms can be used to measure the intensity and phase of the input beam incident upon the SLM via phase diversity imaging. These techniques furnish flexible and convenient solutions to the computational challenges of beam shaping with an SLM.
ISSN:2331-8422