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Linear polarization optimized Stokes polarimeter based on four-quadrant detector.

Chao He, Jintao Chang, Yong Wang

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    This study introduces an optimized Stokes polarimeter using a four-quadrant detector (4QD) for enhanced linear polarization measurements. The novel design improves accuracy for rapidly changing states of polarization (SOP).

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    Area of Science:

    • Optics and Photonics
    • Polarimetry
    • Optical Measurement

    Background:

    • Four-quadrant detectors (4QDs) are typically used for intensity measurements.
    • Stokes polarimetry is crucial for characterizing the polarization state of light.
    • Existing polarimeters may lack optimal performance for specific polarization states.

    Purpose of the Study:

    • To develop an optimized Stokes polarimeter based on a 4QD for improved linear polarization measurements.
    • To enhance the accuracy of simultaneous measurements for fast-varying states of polarization (SOP).
    • To propose an optimization method for the polarimeter's channels.

    Main Methods:

    • A 4QD was adapted into a polarimeter by integrating four polarizers and a quarter-wave plate.
    • An optimization method was developed to prioritize linear polarization components, followed by circular polarization.
    • The polarimeter was designed for simultaneous measurement of dynamic SOP.

    Main Results:

    • The optimized polarimeter demonstrates improved performance specifically for linear polarization measurements.
    • The method allows for accurate characterization of fast-varying states of polarization (SOP).
    • Simultaneous measurement capabilities were achieved with enhanced accuracy.

    Conclusions:

    • The developed Stokes polarimeter offers superior accuracy for linear polarization analysis.
    • The optimization strategy effectively enhances measurement capabilities for dynamic optical signals.
    • This approach advances the field of polarimetry for applications requiring precise polarization characterization.