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All-optical phase conjugation using diffractive wavefront processing

Author

Listed:
  • Che-Yung Shen

    (University of California
    University of California
    University of California)

  • Jingxi Li

    (University of California
    University of California
    University of California)

  • Tianyi Gan

    (University of California
    University of California)

  • Yuhang Li

    (University of California
    University of California
    University of California)

  • Mona Jarrahi

    (University of California
    University of California)

  • Aydogan Ozcan

    (University of California
    University of California
    University of California)

Abstract

Optical phase conjugation (OPC) is a nonlinear technique used for counteracting wavefront distortions, with applications ranging from imaging to beam focusing. Here, we present a diffractive wavefront processor to approximate all-optical phase conjugation. Leveraging deep learning, a set of diffractive layers was optimized to all-optically process an arbitrary phase-aberrated input field, producing an output field with a phase distribution that is the conjugate of the input wave. We experimentally validated this wavefront processor by 3D-fabricating diffractive layers and performing OPC on phase distortions never seen during training. Employing terahertz radiation, our diffractive processor successfully performed OPC through a shallow volume that axially spans tens of wavelengths. We also created a diffractive phase-conjugate mirror by combining deep learning-optimized diffractive layers with a standard mirror. Given its compact, passive and multi-wavelength nature, this diffractive wavefront processor can be used for various applications, e.g., turbidity suppression and aberration correction across different spectral bands.

Suggested Citation

  • Che-Yung Shen & Jingxi Li & Tianyi Gan & Yuhang Li & Mona Jarrahi & Aydogan Ozcan, 2024. "All-optical phase conjugation using diffractive wavefront processing," Nature Communications, Nature, vol. 15(1), pages 1-21, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-49304-y
    DOI: 10.1038/s41467-024-49304-y
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    References listed on IDEAS

    as
    1. Yan Liu & Puxiang Lai & Cheng Ma & Xiao Xu & Alexander A. Grabar & Lihong V. Wang, 2015. "Optical focusing deep inside dynamic scattering media with near-infrared time-reversed ultrasonically encoded (TRUE) light," Nature Communications, Nature, vol. 6(1), pages 1-9, May.
    2. Muhammed Veli & Deniz Mengu & Nezih T. Yardimci & Yi Luo & Jingxi Li & Yair Rivenson & Mona Jarrahi & Aydogan Ozcan, 2021. "Terahertz pulse shaping using diffractive surfaces," Nature Communications, Nature, vol. 12(1), pages 1-13, December.
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