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Non-Hermitian laser arrays with tunable phase locking.

Stefano Longhi

    Optics Letters
    |April 15, 2022
    PubMed
    Summary
    This summary is machine-generated.

    We introduce a novel laser array design inspired by non-Hermitian physics. This design achieves stable, tunable laser emission by suppressing unwanted supermodes, offering robustness against imperfections.

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    Area of Science:

    • Physics
    • Optical Engineering
    • Non-Hermitian Systems

    Background:

    • Non-Hermitian spectral engineering and the non-Hermitian skin effect are key concepts in modern physics.
    • Coupled laser arrays often suffer from unstable emissions and supermode competition.

    Purpose of the Study:

    • To propose a novel design for coupled laser arrays that ensures stable emission.
    • To achieve tunable phase locking and suppress supermode competition using non-Hermitian principles.

    Main Methods:

    • Utilizing a linear array of coupled resonators with asymmetric mode coupling.
    • Implementing the non-Hermitian skin effect by tailoring complex frequencies of edge resonators.

    Main Results:

    • Demonstrated stable emission in a single extended supermode.
    • Achieved tunable phase locking and strong suppression of competing skin supermodes.
    • Showcased robustness against structural imperfections and dynamical instabilities.

    Conclusions:

    • The proposed laser array design offers a promising solution for stable and controllable laser emission.
    • This approach leverages non-Hermitian physics for enhanced laser array performance.