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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Encoding multipolar polarization patterns by optical poling in polymers: towards nonlinear optical memories.

Sébastien Bidault, Jérôme Gouya, Sophie Brasselet

    Optics Express
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    PubMed
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    We developed a new method for optical data storage using all-optical poling of polymer films. This technique encodes nonlinear information with high spatial resolution, enabling denser data storage possibilities.

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    Area of Science:

    • Materials Science
    • Optics
    • Nanoscience

    Background:

    • Photoisomerizable molecules in polymer films can be patterned using light.
    • Nonlinear optical phenomena like second harmonic generation (SHG) are sensitive to molecular orientation.

    Purpose of the Study:

    • To demonstrate spatially resolved polarization encoding of nonlinear information.
    • To explore the potential for high-density optical data storage.

    Main Methods:

    • All-optical poling of photoisomerizable and nonlinear molecules in polymer films.
    • Imaging of second harmonic generation (SHG) polarization responses using nonlinear microscopy.
    • Utilizing the dependence of SHG on poling field polarization for information encoding.

    Main Results:

    • Achieved spatially resolved polarization encoding of nonlinear information.
    • Demonstrated imaging of photo-induced patterns with 2 micrometer lateral resolution.
    • Showcased the potential for high-density optical data storage via SHG polarization encoding.

    Conclusions:

    • All-optical poling provides a method for encoding nonlinear information in polymer films.
    • The technique offers potential for advanced optical data storage solutions.
    • Imprinted nonlinear susceptibilities with multipolar symmetries are not detectable by traditional holography.