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Brewster-angle pockels cell design.

D Milam

    Applied Optics
    |February 4, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study details a Brewster-angled Pockels cell for Q-switching. It reveals extinction ratio limitations based on cell window configurations, crucial for laser pulse selection.

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    Area of Science:

    • Optics and Photonics
    • Laser Technology
    • Materials Science

    Background:

    • Pockels cells are essential components in laser systems for Q-switching.
    • Optimizing extinction ratio is critical for high-contrast laser pulses.
    • Brewster's angle surfaces offer low-loss optical interfaces but can impact performance.

    Purpose of the Study:

    • To describe a novel Pockels cell design with all surfaces at Brewster's angle.
    • To analyze the impact of Brewster faces on the extinction ratio of a quarter-wave mode Q-switch.
    • To evaluate the performance of this design in a ruby laser system.

    Main Methods:

    • Theoretical analysis of extinction ratio limitations based on cell geometry.
    • Experimental measurement of extinction ratio in a prototype Pockels cell.

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  • Integration and operation of the Q-switch with a ruby laser.

    • Main Results:

    • The extinction ratio is limited to 180:1 with one window and one mirror, and 28:1 with two windows.
    • An experimental cell with a single window achieved a measured extinction ratio of 150:1.
    • Successful operation of a ruby laser using the developed Q-switch.

    Conclusions:

    • The Pockels cell design with Brewster's angle surfaces presents specific extinction ratio trade-offs.
    • A single-window configuration is superior for achieving higher extinction ratios.
    • This Pockels cell shows potential for high contrast ratio, low loss pulse selection in mode-locked lasers.