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EO nonlinear function generator.

Zhangqi Dang, Zeyu Deng, Tao Chen

    Optics Letters
    |April 1, 2024
    PubMed
    Summary
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    A novel electro-optical programmable nonlinear function generator (PNFG) uses thermal electrodes on a multimode waveguide to create adaptable functions like Sigmoid and Gaussian for photonic computing.

    Area of Science:

    • Photonics
    • Optical Engineering
    • Nonlinear Optics

    Background:

    • Photonic computing requires adaptable nonlinear functions for complex computations.
    • Existing methods for generating nonlinear optical functions can be complex and lack flexibility.

    Purpose of the Study:

    • To develop an electro-optical programmable nonlinear function generator (PNFG) on a multimode waveguide.
    • To demonstrate the generation of basic nonlinear functions (Sigmoid, SiLU, Gaussian) with adjustable shapes.

    Main Methods:

    • Utilizing four parallel thermal electrodes to modulate multimode interference.
    • Analyzing electro-thermo-optical effects and their impact on eigenmode properties.
    • Employing an optimization program to identify settings for simplified function generation.

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    Main Results:

    • The PNFG successfully generated various nonlinear functions, including Sigmoid, SiLU, and Gaussian.
    • The shape of these functions was adjustable by tuning the thermal electrodes.
    • Optical output power variations demonstrated complex functional relationships with input current.

    Conclusions:

    • The developed PNFG offers a flexible platform for adaptable nonlinear optical functions.
    • This device holds potential for integration into large-scale photonic computing networks.
    • The ability to fine-tune function shapes enhances its applicability in solving complex problems.