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Frequency-stabilized laser-diode-pumped Nd:YAG laser.

D Shoemaker, A Brillet, C N Man

    Optics Letters
    |September 16, 2009
    PubMed
    Summary
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    We stabilized a diode-pumped Nd:YAG laser

    Area of Science:

    • Laser Physics
    • Quantum Optics
    • Precision Measurement

    Background:

    • High-stability lasers are crucial for precision measurements.
    • Free-running lasers have inherent frequency noise limitations.
    • Stabilizing laser frequency to an optical cavity is a common technique.

    Purpose of the Study:

    • To actively stabilize the frequency of a diode-pumped Nd:YAG laser.
    • To demonstrate frequency stabilization using the Pound-Drever technique.
    • To characterize the performance of the stabilization servo loop.

    Main Methods:

    • Utilized a diode-pumped Nd:YAG laser.
    • Employed the Pound-Drever technique for frequency stabilization.
    • Locked the laser frequency to a reference Fabry-Perot cavity.

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  • Measured servo loop noise and gain performance.

    • Main Results:

    • Achieved active frequency stabilization of the Nd:YAG laser.
    • Reduced laser frequency noise close to the shot-noise limit (12.5 mHz/√Hz).
    • Demonstrated a laser linewidth of approximately 1 mHz.
    • Significantly reduced linewidth compared to the Schawlow-Townes limit (0.13 Hz) for free-running lasers.

    Conclusions:

    • The Pound-Drever technique effectively stabilizes diode-pumped Nd:YAG lasers.
    • Achieved near shot-noise-limited frequency stability.
    • The stabilized laser exhibits an ultra-narrow linewidth, enabling advanced precision measurements.