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Longitudinally diode-pumped Nd:YAG double-clad planar waveguide laser.

J I Mackenzie, C Li, D P Shepherd

    Optics Letters
    |November 28, 2007
    PubMed
    Summary
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    We demonstrated a compact, diode-pumped Nd:YAG waveguide laser. This efficient laser operates at multiple wavelengths with near-diffraction-limited beam quality, suitable for various applications.

    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Materials Science

    Background:

    • Diode-pumped solid-state lasers offer efficient and compact solutions for various applications.
    • Planar waveguide lasers provide excellent beam quality and thermal management.
    • Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) is a widely used gain medium for lasers.

    Purpose of the Study:

    • To demonstrate a compact, diode-end-pumped double-clad planar waveguide Nd:YAG laser.
    • To investigate efficient laser operation at multiple Nd(3+) transitions.
    • To characterize the beam quality of the developed waveguide laser.

    Main Methods:

    • Fabrication of a double-clad planar waveguide structure using Nd:YAG material.
    • End-pumping the waveguide with diode lasers.

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  • Utilizing various output couplers to optimize laser performance at different wavelengths.
  • Measuring output power and beam quality (M(2) values).

    • Main Results:

    • Achieved efficient laser operation at Nd(3+) transitions of 1.064, 0.946, and 1.32 micrometers.
    • Obtained TE polarized output powers of 1.33 W, 0.57 W, and 0.33 W.
    • Measured near-diffraction-limited beam quality with M(2) values of 1.0 and 1.8 perpendicular and parallel to the waveguide plane, respectively.

    Conclusions:

    • The developed diode-end-pumped double-clad planar waveguide Nd:YAG laser is compact and efficient.
    • The laser demonstrates versatile operation across multiple wavelengths with excellent beam quality.
    • This technology holds promise for applications requiring compact, high-quality laser sources.