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Directly modulated azimuthally polarized vector beam laser design.

Xiang Ma, Shaobo Li, Xiaodong Liang

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    |October 18, 2022
    PubMed
    Summary

    We developed the first high-speed directly modulated vector beam laser emitting azimuthally polarized light. This semiconductor laser achieves a 40 GHz bandwidth, promising for optical communications and quantum information.

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    Area of Science:

    • Optics and Photonics
    • Semiconductor Lasers
    • Vector Beam Technology

    Background:

    • Directly modulated vector beam lasers are crucial for advanced optical applications.
    • Existing technologies face limitations in speed and polarization control.

    Purpose of the Study:

    • To report the first high-speed directly modulated vector beam laser with azimuthal polarization.
    • To demonstrate a novel microcylinder cavity design for efficient surface emission and single-mode lasing.

    Main Methods:

    • Theoretical and numerical analysis for laser design.
    • Integration of a microcylinder cavity with a second-order grating.
    • Utilizing high-differential-gain material and a small active region.

    Main Results:

    • Achieved single-mode lasing and efficient surface emission.
    • Demonstrated an azimuthally polarized vector beam output.
    • Simulated a 40 GHz 3 dB bandwidth for direct modulation.

    Conclusions:

    • The developed laser is the first of its kind for high-speed direct modulation and azimuthal polarization.
    • The novel design enables efficient vector beam generation and high-speed operation.
    • This technology holds significant potential for fiber space communications and quantum information.