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Polarization-independent prism coupling based on a liquid crystal cladding waveguide.

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    This study introduces a novel prism coupling structure using liquid crystal cladding to overcome polarization sensitivity. Achieved 80% efficiency in experiments, offering a solution for integrated optical devices.

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    Area of Science:

    • Optoelectronics
    • Materials Science
    • Integrated Optics

    Background:

    • Traditional prism coupling is limited by phase-matching conditions and incident light beam mode.
    • This leads to polarization sensitivity, hindering polarization-independent light beam coupling.

    Purpose of the Study:

    • To develop a novel prism coupling structure that addresses polarization sensitivity.
    • To investigate the modulation characteristics of polarization-independent prism coupling using anisotropic liquid crystal cladding.

    Main Methods:

    • Introduced a novel prism coupling structure with anisotropic liquid crystal cladding.
    • Conducted theoretical simulations to analyze modulation characteristics.
    • Fabricated and experimentally tested a liquid crystal-based prism coupler.

    Main Results:

    • Theoretical simulations predicted a polarization-independent coupling efficiency of up to 91%.
    • Experimental testing achieved a polarization-independent coupling efficiency of 80%.
    • Demonstrated the viability of liquid crystal cladding for polarization-independent coupling.

    Conclusions:

    • The novel liquid crystal-based prism coupler effectively overcomes polarization sensitivity.
    • This research provides a practical solution for polarization-independent light beam coupling in integrated optical devices.