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Concept and application of a linearized ring multipass optics configuration.

Björn Waßmuth, Guido W Fuchs, Henrik Zimmermann

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    Researchers developed novel multipass optics (MPO) systems using linearized optical ring resonators. These systems achieve higher beam densities and optical robustness, improving laser beam path length in limited volumes.

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    Area of Science:

    • Optics and Photonics
    • Laser Technology
    • Optical Engineering

    Background:

    • Multipass optics (MPO) systems enhance optical path length within confined volumes.
    • Existing designs like White-type and Herriott-type cells have limitations in volume utilization.
    • Astigmatic MPO systems offer high beam density but suffer from misalignment sensitivity.

    Purpose of the Study:

    • To develop MPO systems combining high beam density with optical robustness.
    • To overcome the limitations of existing MPO designs for increased efficiency.
    • To create a more compact and effective optical path length enhancement solution.

    Main Methods:

    • Utilized linearized optical ring resonators constructed with 2x2 optical ABCD-matrices.
    • Designed and optimized an MPO system for 10 µm wavelength laser beams.
    • Employed a base length of 150 mm and achieved a total beam path length of 19.2 m.

    Main Results:

    • Demonstrated a novel MPO system design.
    • Achieved a cell volume of 295 cm³.
    • Attained a beam density four times higher than standard Herriott-type cells.

    Conclusions:

    • Linearized optical ring resonators provide a viable solution for robust MPO systems.
    • The developed MPO system offers significantly improved beam density in a compact volume.
    • This advancement has potential applications in various laser-based technologies requiring long optical paths.