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    Area of Science:

    • Biomedical Optics
    • Optical Engineering
    • Medical Imaging Technology

    Background:

    • Spectral-domain polarization-sensitive optical coherence tomography (SD-PS-OCT) systems typically use a single detector.
    • This single-detector scheme can lead to a position mismatch problem between orthogonally polarized signals.
    • This mismatch results in uncorrelated signals, hindering accurate polarization analysis.

    Purpose of the Study:

    • To propose and validate a method for mitigating the position mismatch problem in single-detector SD-PS-OCT.
    • To enable sequential detection of simultaneously scattered light from different polarization states.
    • To improve the reliability and accuracy of polarization-sensitive OCT imaging.

    Main Methods:

    • Implementation of a buffering single-mode fiber optic delay line.
    • Connecting the fiber to an optical switch port to introduce a precise time delay.
    • Determining the fiber length (2.69 km) based on the spectrometer's frame rate for synchronization.

    Main Results:

    • Successful mitigation of the position mismatch between adjacent A-scan signals.
    • Achieved sequential detection of simultaneously scattered light, reducing signal decorrelation.
    • Demonstrated a simple and effective configuration for SD-PS-OCT with minimized position mismatch.

    Conclusions:

    • The proposed buffering fiber method effectively resolves the position mismatch issue in single-detector SD-PS-OCT.
    • This technique offers a straightforward approach to enhance polarization-sensitive imaging quality.
    • The optimized SD-PS-OCT system provides more reliable and correlated polarization data.