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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Monolithic, unidirectional single-mode Nd:YAG ring laser.

T J Kane, R L Byer

    Optics Letters
    |September 3, 2009
    PubMed
    Summary
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    Researchers developed a novel nonplanar ring oscillator using a Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) crystal. Applying a magnetic field enabled unidirectional oscillation, achieving a single-axial-mode output of 163 mW.

    Area of Science:

    • Optics and Photonics
    • Solid-State Lasers
    • Materials Science

    Background:

    • Nonplanar ring oscillators offer advantages in unidirectional operation and mode stability.
    • Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) is a widely used gain medium for solid-state lasers.
    • Controlling laser oscillation direction is crucial for various applications.

    Purpose of the Study:

    • To construct and investigate a novel nonplanar ring oscillator.
    • To explore the effect of magnetic fields on the oscillation characteristics of the device.
    • To achieve unidirectional, single-axial-mode laser output.

    Main Methods:

    • Fabrication of a nonplanar ring oscillator with the resonator integrated within a Nd:YAG crystal.
    • Application of an external magnetic field to the oscillator.

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  • Characterization of the laser output, including oscillation direction and mode structure.

    • Main Results:

    • Successful construction of a nonplanar ring oscillator entirely within a Nd:YAG crystal.
    • Observation of unidirectional oscillation when the oscillator was subjected to a magnetic field.
    • Achieved a pump-limited, single-axial-mode output power of 163 mW.

    Conclusions:

    • The integrated nonplanar ring oscillator design in Nd:YAG is feasible.
    • Magnetic field application effectively induces unidirectional oscillation.
    • The device demonstrates potential for stable, single-mode laser operation.