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Electrically driven supersymmetric semiconductor laser arrays with single-lobe far-field patterns.

Ting Fu, Jingxuan Chen, Yufei Wang

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    |February 14, 2023
    PubMed
    Summary

    Semiconductor laser arrays utilizing third-order supersymmetric (SUSY) transformations enhance mode discrimination. This design improves performance for optical coupling applications.

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    Area of Science:

    • Optics and Photonics
    • Semiconductor Device Physics

    Background:

    • Semiconductor laser arrays are crucial for high-power light generation.
    • Achieving high mode discrimination is essential for stable laser operation and efficient coupling.

    Purpose of the Study:

    • To propose and investigate semiconductor laser arrays based on third-order supersymmetric (SUSY) transformations.
    • To enhance mode discrimination between the fundamental supermode and higher-order supermodes.

    Main Methods:

    • Utilizing third-order supersymmetric (SUSY) transformation for laser array design.
    • Optimizing the distance between the main array and superpartner waveguides.
    • Calculating electric field distributions to analyze mode behavior.

    Main Results:

    • The optimized distance leads to increased loss for higher-order supermodes.
    • Higher-order modes exhibit deeper penetration into superpartner arrays compared to the fundamental supermode.
    • Fabricated third-order SUSY laser arrays demonstrate single-lobe far-field patterns at 70 mA injection current.

    Conclusions:

    • Third-order SUSY laser arrays effectively increase mode discrimination.
    • The design shows promise for efficient optical coupling applications.
    • This approach offers a viable path for developing advanced semiconductor laser sources.