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J J Zayhowski, C Dill Iii

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    Electro-optically Q-switched Neodymium-doped Yttrium Orthovanadate (Nd:YVO4) microchip lasers demonstrate high-energy, picosecond pulses at low repetition rates and high-repetition rate, nanosecond pulses.

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    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Materials Science

    Background:

    • Microchip lasers offer compact and efficient laser sources.
    • Q-switching is a technique to achieve high peak power pulses.
    • Neodymium-doped Yttrium Orthovanadate (Nd:YVO4) is a widely used laser gain medium.

    Purpose of the Study:

    • To investigate the performance of electro-optically Q-switched Nd:YVO4 microchip lasers.
    • To characterize laser output parameters at different repetition rates.
    • To explore the potential for generating both picosecond and nanosecond pulses.

    Main Methods:

    • Utilized an electro-optic Q-switching mechanism.
    • Employed Nd:YVO4 as the gain medium in a microchip laser configuration.
    • Varied the repetition rate to observe changes in pulse characteristics.

    Main Results:

    • Achieved 12-microJ pulses with 115-ps duration at repetition rates up to 1 kHz.
    • Obtained 0.16-microJ pulses with 8.8-ns duration at a 2.25 MHz repetition rate.
    • Demonstrated the versatility of the Q-switched microchip laser system.

    Conclusions:

    • Electro-optic Q-switching is effective for Nd:YVO4 microchip lasers.
    • The laser system can be tuned to produce either high-energy picosecond pulses or high-repetition rate nanosecond pulses.
    • These results highlight the potential applications in various fields requiring pulsed laser sources.