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    This study introduces a hybrid-splay twisted liquid crystal (HST-LC) device for optical communications. The optimized HST-LC offers efficient polarization control across the communication wavelength range with reduced signal loss.

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    Area of Science:

    • Optoelectronics
    • Materials Science

    Background:

    • Polarization control is crucial for enhancing data capacity in optical communication.
    • Existing polarization controllers often exhibit significant dispersion, causing signal degradation.

    Purpose of the Study:

    • To develop a practical polarization controller for optical communication using hybrid-splay twisted liquid crystal (HST-LC).
    • To optimize the HST-LC for efficient linear polarization rotation (90°) with minimal voltage.
    • To ensure the device covers a wide polarization rotation range (0° to 135°) and exhibits achromatic modulation.

    Main Methods:

    • Utilizing a hybrid-splay twisted liquid crystal (HST-LC) structure.
    • Enlarging the twisting angle of the HST-LC to optimize voltage requirements.
    • Optimizing the rotation angle range for broad polarization applications.
    • Confirming achromatic modulation within the 1260-1675 nm communication wavelength range.

    Main Results:

    • Achieved linear polarization rotation within the optical communication wavelength range (1260-1675 nm).
    • Optimized HST-LC design reduces the required voltage for 90° polarization rotation.
    • The device successfully covers a polarization rotation range from 0° to 135°.
    • Demonstrated achromatic modulation of linear polarization, crucial for broadband optical systems.

    Conclusions:

    • The optimized HST-LC is a promising solution for polarization control in optical communication, mitigating dispersion issues.
    • The device offers practical advantages including lower operating voltage and a wide operational range.
    • Achromatic polarization modulation confirms the HST-LC's suitability for diverse optical communication applications.