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Parametric amplification in large-aperture diffusion-bonded periodically poled crystals.

Eli Sobolev, Pavel Komm, Salman Noah

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    Diffusion bonding overcomes thickness limitations in periodically poled crystals, enabling wider apertures for high-energy optical parametric amplifiers. This technique preserves beam quality for powerful, large-aperture applications.

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    Area of Science:

    • Materials Science
    • Nonlinear Optics
    • Crystal Engineering

    Background:

    • Conventional poling of pyroelectric crystals is limited to 0.5-1 mm thickness.
    • Small crystal apertures restrict energy/power delivery in optical devices.
    • Periodically poled crystals are crucial for nonlinear optical applications like optical parametric amplification.

    Purpose of the Study:

    • To introduce diffusion bonding as a method for creating wider periodically poled crystals.
    • To investigate the feasibility of extending periodically poled crystal apertures beyond conventional limits.
    • To assess the impact of diffusion bonding on amplified signal quality.

    Main Methods:

    • Utilizing diffusion bonding to join crystal segments.
    • Fabricating wider periodically poled crystals.
    • Characterizing the optical properties and beam profile of amplified signals.

    Main Results:

    • Diffusion bonding allows for the creation of periodically poled crystals with virtually unlimited width.
    • The amplified signal maintained a good beam profile, even with potential phase shifts between bonded segments.
    • The technique demonstrates potential for scaling up optical parametric amplifiers.

    Conclusions:

    • Diffusion bonding is a viable alternative for producing large-aperture periodically poled crystals.
    • This method enables higher energy output from optical parametric amplifiers.
    • The technique offers a pathway to overcome limitations in current periodically poled crystal fabrication.