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Surface-emitting distributed feedback laser based on high-order gratings.

Yingquan Ao, Jinghao Wang, Deming Liu

    Applied Optics
    |September 11, 2019
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a surface-emitting distributed feedback laser with high-order gratings. This novel laser offers advantages like hybrid integration and a simple fabrication process, alongside excellent single-mode properties and high output power.

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    Area of Science:

    • Photonics and Laser Technology
    • Semiconductor Devices
    • Optical Engineering

    Background:

    • Edge-emitting lasers offer high performance but lack integration ease.
    • Surface-emitting lasers provide integration benefits but often compromise performance.
    • Developing lasers that combine both edge-emitting advantages and surface-emitting benefits is crucial for advanced photonic applications.

    Purpose of the Study:

    • To report a novel surface-emitting (SE) distributed feedback laser design.
    • To leverage high-order surface gratings for enhanced laser characteristics.
    • To demonstrate a device combining edge-emitting laser advantages with surface-emitting integration capabilities.

    Main Methods:

    • Design and fabrication of a surface-emitting distributed feedback laser utilizing high-order surface gratings.
    • Analysis and optimization using an improved traveling wave model.
    • Evaluation of performance metrics including single-mode property, quantum efficiency, and output power.

    Main Results:

    • The proposed SE distributed feedback laser retains excellent single-mode property, high internal quantum efficiency, and high output power.
    • The device demonstrates easy realization of hybrid integration and a simple fabrication process.
    • Optimization via the traveling wave model led to improved device performance.

    Conclusions:

    • The developed surface-emitting distributed feedback laser offers a promising solution for integrated photonics.
    • This design successfully merges the benefits of edge-emitting and surface-emitting laser architectures.
    • The device facilitates simpler fabrication and hybrid integration without sacrificing key performance metrics.