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Multiwatt continuous-wave adaptive laser resonator.

M Trew, G J Crofts, M J Damzen

    Optics Letters
    |December 11, 2007
    PubMed
    Summary
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    We demonstrate a novel adaptive gain-grating resonator for continuous-wave diode-pumped Neodymium-doped Yttrium Orthovanadate (Nd:YVO4) lasers. This system achieves over 7-W TEM00 output with excellent beam quality and self-adaptive aberration correction.

    Area of Science:

    • Laser Physics
    • Nonlinear Optics
    • Materials Science

    Background:

    • Neodymium-doped Yttrium Orthovanadate (Nd:YVO4) lasers are widely used for various applications.
    • Achieving high-power, single-mode output with excellent beam quality remains a challenge.
    • Adaptive optical techniques offer potential solutions for improving laser performance.

    Purpose of the Study:

    • To investigate the performance of a Nd:YVO4 laser system utilizing an adaptive gain-grating resonator.
    • To demonstrate the self-adaptive capabilities of the resonator in correcting intracavity aberrations.
    • To achieve high-power, single longitudinal mode output with superior beam quality.

    Main Methods:

    • Continuous-wave diode-pumping of a Nd:YVO4 laser.
    • Implementation of an adaptive gain-grating resonator.

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  • Characterization of output power, beam propagation factor (M²), and mode quality (TEM00).
  • Demonstration of spatial aberration correction using the self-adaptive resonator.

    • Main Results:

    • The system achieved over 7-W output power in a TEM00 single longitudinal mode.
    • Excellent beam quality was observed with M² values of <1.3 (x-axis) and <1.1 (y-axis).
    • The adaptive resonator successfully corrected intracavity aberrations in both injected and self-starting configurations.

    Conclusions:

    • The adaptive gain-grating resonator is a promising technology for high-performance Nd:YVO4 lasers.
    • This approach enables robust, high-power, single-mode laser operation with excellent beam quality.
    • The self-adaptive nature of the resonator simplifies alignment and improves tolerance to intracavity disturbances.