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500  W peak power cavity dumped 2  µm GaSb-based VECSEL.

Jacob Hoehler, Ricky Gibson, Jennifer M Reed

    Applied Optics
    |October 6, 2021
    PubMed
    Summary

    A novel Gallium Antimonide-based vertical-external-cavity surface-emitting laser (VECSEL) achieved over 500 W peak power at 2.04 µm. This high-pulse-energy laser demonstrates excellent beam quality for diverse applications.

    Area of Science:

    • Optics and Photonics
    • Semiconductor Lasers
    • Materials Science

    Background:

    • Vertical-external-cavity surface-emitting lasers (VECSELs) offer advantages in beam quality and scalability.
    • High-power, wavelength-specific lasers are crucial for advanced applications.
    • Gallium Antimonide (GaSb)-based materials are suitable for mid-infrared emission.

    Purpose of the Study:

    • To develop a single transverse mode, high-pulse-energy VECSEL.
    • To achieve high output power at a specific wavelength (2.04 µm).
    • To demonstrate the potential of GaSb-based VECSELs for demanding applications.

    Main Methods:

    • Fabrication of a GaSb-based VECSEL structure.
    • Implementation of a resonant cavity incorporating a Pockels cell and thin film polarizer.

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  • Utilizing a pulse-dumping mechanism for short pulse generation (10 ns).

    • Main Results:

    • A single transverse mode VECSEL was successfully developed.
    • The VECSEL achieved a peak output power exceeding 500 W at 2.04 µm.
    • The laser maintained good beam quality throughout operation.

    Conclusions:

    • The developed GaSb-based VECSEL is a high-performance laser source.
    • The device shows significant promise for applications including incoherent LIDAR, materials processing, gas sensing, and nonlinear optics.