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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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Reference-free polarization-sensitive quantitative phase imaging using single-point optical phase conjugation.

Seungwoo Shin, KyeoReh Lee, Zahid Yaqoob

    Optics Express
    |November 25, 2018
    PubMed
    Summary
    This summary is machine-generated.

    We developed a novel polarization-sensitive quantitative phase imaging technique. This method uses a digital micromirror device and two photodetectors to analyze polarization states, enabling detailed imaging of birefringent materials without a reference beam.

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    Area of Science:

    • Optics and Photonics
    • Biomedical Imaging
    • Materials Science

    Background:

    • Quantitative phase imaging (QPI) is crucial for label-free biological and material analysis.
    • Traditional QPI methods often require complex setups with reference beams and image sensors.
    • Characterizing polarization-dependent optical properties, like birefringence, remains challenging.

    Purpose of the Study:

    • To introduce a simplified polarization-sensitive quantitative phase imaging (PS-QPI) method.
    • To enable label-free, quantitative phase and polarization analysis of materials.
    • To overcome limitations of conventional QPI techniques.

    Main Methods:

    • Utilized a digital micromirror device (DMD) for polarization modulation.
    • Employed two photodetectors to measure intensity variations.
    • Developed an algorithm to reconstruct phase information based on polarization states, eliminating the need for a reference beam.

    Main Results:

    • Successfully demonstrated PS-QPI without a reference beam or image sensor.
    • Reconstructed Jones matrices for various samples, including microspheres, starch granules, and biological tissues (mouse retinal nerve fiber layer).
    • Validated the method's ability to perform polarization-dependent quantitative phase imaging.

    Conclusions:

    • The proposed PS-QPI method is simple, general, and effective.
    • This technique offers a promising solution for quantitative phase imaging of birefringent materials.
    • Potential applications in diverse fields requiring detailed optical property characterization.