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Updated: Jun 22, 2026

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Single frequency, high power, tapered diode laser using phase-conjugated feedback.

Christian Pedersen, René Hansen

    Optics Express
    |June 5, 2009
    PubMed
    Summary

    This study achieves 1.6 Watts of single frequency output from a 785 nm tapered diode laser. A novel external cavity design suppresses self-wavelength scanning for stable laser operation.

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    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Materials Science

    Background:

    • Tapered diode lasers offer high power output but often suffer from wavelength instability.
    • Phase-conjugating crystals can be used for wavelength selection in laser cavities.
    • Self-wavelength scanning is a known issue when using phase-conjugating crystals in laser systems.

    Purpose of the Study:

    • To demonstrate high single-frequency output power from a tapered diode laser.
    • To investigate a novel external cavity design for stable laser operation.
    • To suppress the self-wavelength scanning effect in phase-conjugating laser cavities.

    Main Methods:

    • Utilized a tapered diode laser operating at 785 nm.
    • Implemented a rear-end external cavity with a Barium Titanate (BaTiO3) phase-conjugating crystal and a high-reflection mirror.
    • Employed a two-beam coupling model for theoretical analysis.

    Main Results:

    • Achieved up to 1.6 Watts of single-frequency output power.
    • The external cavity design effectively suppressed the self-wavelength scanning effect.
    • Experimental results were supported by theoretical modeling.

    Conclusions:

    • The demonstrated external cavity configuration provides a stable and high-power single-frequency output from tapered diode lasers.
    • This approach offers a viable solution for mitigating wavelength instability issues in phase-conjugating laser systems.
    • The findings have implications for applications requiring stable, high-power laser sources.

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