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3-W continuous-wave diode-pumped 532-nm laser.

L R Marshall, A Kaz, A D Hays

    Optics Letters
    |October 2, 2009
    PubMed
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    A continuous-wave diode-pumped neodymium-doped yttrium aluminum garnet (Nd:YAG) laser was mode-locked to produce 5.5 W of infrared output. Intracavity frequency doubling yielded 3 W of green, mode-locked laser light.

    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Nonlinear Optics

    Background:

    • Neodymium-doped yttrium aluminum garnet (Nd:YAG) lasers are widely used for various applications.
    • Mode-locking is a technique to produce ultrashort laser pulses.
    • Intracavity frequency doubling is an efficient method for generating second-harmonic wavelengths.

    Purpose of the Study:

    • To demonstrate high-power, mode-locked operation of a diode-pumped Nd:YAG laser.
    • To achieve efficient second-harmonic generation (SHG) for visible laser output.
    • To characterize the performance of the frequency-doubled laser system.

    Main Methods:

    • Utilized a continuous-wave (cw) diode-pumped Nd:YAG laser.
    • Implemented mode-locking at a repetition rate of 80 MHz.

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  • Employed potassium titanyl phosphate (KTP) crystal for intracavity frequency doubling.

    • Main Results:

    • Achieved 5.5 W of output power at 1.064 micrometers (infrared).
    • Generated 3 W of mode-locked output power at 0.532 micrometers (green) via frequency doubling.
    • Demonstrated efficient SHG with the KTP crystal.

    Conclusions:

    • The diode-pumped Nd:YAG laser system is capable of producing high-power, mode-locked infrared output.
    • Intracavity frequency doubling using KTP is an effective method for generating visible, mode-locked laser light.
    • This system offers a viable source for applications requiring high-power, pulsed green laser emission.