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Single-shot polarimetry of vector beams by supervised learning

Author

Listed:
  • Davide Pierangeli

    (Institute for Complex Systems - National Research Council (ISC-CNR)
    Sapienza University of Rome)

  • Claudio Conti

    (Sapienza University of Rome
    Research Center Enrico Fermi (CREF))

Abstract

States of light encoding multiple polarizations - vector beams - offer unique capabilities in metrology and communication. However, their practical application is limited by the lack of methods for measuring many polarizations in a scalable and compact way. Here we demonstrate polarimetry of vector beams in a single shot without any polarization optics. We map the beam polarization content into a spatial intensity distribution through light scattering and exploit supervised learning for single-shot measurements of multiple polarizations. We characterize structured light encoding up to nine polarizations with accuracy beyond 95% on each Stokes parameter. The method also allows us to classify beams with an unknown number of polarization modes, a functionality missing in conventional techniques. Our findings enable a fast and compact polarimeter for polarization-structured light, a general tool that may radically impact optical devices for sensing, imaging, and computing.

Suggested Citation

  • Davide Pierangeli & Claudio Conti, 2023. "Single-shot polarimetry of vector beams by supervised learning," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-37474-0
    DOI: 10.1038/s41467-023-37474-0
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    References listed on IDEAS

    as
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    4. Freund, Isaac, 1990. "Looking through walls and around corners," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 168(1), pages 49-65.
    5. Ziyi Zhu & Molly Janasik & Alexander Fyffe & Darrick Hay & Yiyu Zhou & Brian Kantor & Taylor Winder & Robert W. Boyd & Gerd Leuchs & Zhimin Shi, 2021. "Compensation-free high-dimensional free-space optical communication using turbulence-resilient vector beams," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
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