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Super-Gaussian resonators for long-pulse XeCl lasers.

S E Kovalenko, V Losev, M R Perrone

    Applied Optics
    |October 12, 2010
    PubMed
    Summary

    High-energy, near-diffraction-limited laser beams were produced using a Xenon Chloride (XeCl) laser. Replacing the super-Gaussian coupler with a hard-edge mirror reduced energy but increased beam divergence.

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    Area of Science:

    • Laser Physics
    • Optics
    • High-Energy Lasers

    Background:

    • Achieving high-energy, near-diffraction-limited laser beams is crucial for various applications.
    • Unstable resonators are commonly used for high-power laser beam generation.
    • Super-Gaussian mirrors offer advantages in beam quality control.

    Purpose of the Study:

    • To investigate the performance of a long-pulse Xenon Chloride (XeCl) laser system.
    • To evaluate the impact of output coupler design on laser beam characteristics.
    • To compare super-Gaussian unstable cavities with traditional hard-edge mirrors.

    Main Methods:

    • Utilized a long-pulse (110-ns) XeCl laser system.
    • Employed a super-Gaussian unstable resonator with a magnification of M = 2.7.
    • Replaced the super-Gaussian output coupler with a hard-edge aluminized mirror of equivalent spot size.

    Main Results:

    • Near-diffraction-limited laser beams of high energy were successfully achieved.
    • Replacing the super-Gaussian coupler with a hard-edge mirror decreased output laser energy by 10%.
    • The same substitution led to a more than 50% increase in beam divergence.

    Conclusions:

    • Super-Gaussian unstable cavities are effective for generating high-quality, high-energy laser beams.
    • Hard-edge mirrors, while simpler, compromise beam quality and energy output compared to super-Gaussian designs.
    • Cavity design significantly influences the trade-off between energy extraction and beam divergence in XeCl lasers.

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