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InGaN-diode-pumped AlGaInP VECSEL with sub-kHz linewidth at 689 nm.

Paulo H Moriya, Riccardo Casula, George A Chappell

    Optics Express
    |March 27, 2021
    PubMed
    Summary
    This summary is machine-generated.

    We developed a compact, tunable VECSEL emitting at 689 nm for quantum technologies. This laser system offers stable, low-noise performance, making it ideal for strontium atom applications.

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    Area of Science:

    • Optics and Photonics
    • Quantum Technology

    Background:

    • Vertical-cavity surface-emitting lasers (VECSELs) are crucial for various applications.
    • Developing compact, stable, and tunable laser sources is essential for advancing quantum technologies.

    Purpose of the Study:

    • To design, grow, and characterize an AlGaInP-based VECSEL.
    • To achieve stable, single-mode emission around 689 nm using optical pumping.
    • To assess the suitability of this VECSEL for quantum applications, specifically those involving strontium atoms.

    Main Methods:

    • Optical pumping of an AlGaInP VECSEL using a blue InGaN diode laser.
    • Characterization of output power, tunability, and mode properties (TEM00, single longitudinal mode).
    • Intensity stabilization of the pump diode and frequency stabilization of the VECSEL resonator using the Pound-Drever-Hall technique.

    Main Results:

    • Achieved up to 140 mW output power in a circularly-symmetric single transverse mode.
    • Demonstrated tunability from 683 to 693 nm.
    • Measured sub-kHz linewidth and relative intensity noise (RIN) below -130 dBc/Hz above 100 kHz.

    Conclusions:

    • The developed VECSEL is a compact and stable laser source.
    • Its performance characteristics are well-suited for applications in quantum technologies.
    • Specifically recommended for laser-cooled and trapped strontium atom experiments.