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    This study introduces a novel linear all-optical half-adder using a three-core fiber. This fiber-based device offers high performance for optical data processing, demonstrating the potential of fiber design for logic functions.

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    Area of Science:

    • Photonics
    • Optical Computing
    • Fiber Optics

    Background:

    • The half-adder is a fundamental combinational logic function crucial for data processing.
    • Existing all-optical half-adder research predominantly focuses on nonlinear devices, with limited exploration of linear optical approaches, often requiring complex 2D photonic crystals.

    Purpose of the Study:

    • To numerically demonstrate an all-optical half-adder utilizing a linear three-core fiber device.
    • To investigate the performance, fabrication tolerance, and modulation tolerance of the proposed linear optical device.

    Main Methods:

    • Numerical simulation of light propagation through a specifically designed three-core fiber structure.
    • Analysis of the device's logical output based on input optical signals.

    Main Results:

    • Successful numerical acquisition of an all-optical half-adder function using a linear fiber design.
    • The device exhibits high performance with acceptable fabrication and modulation tolerances.
    • The design is versatile, compatible with various fiber technologies and optical wavelengths.
    • Fabrication precision requirements range from 20 nm to 90 nm, depending on the fiber type.

    Conclusions:

    • Linear three-core fiber devices can effectively implement all-optical half-adder functions.
    • This approach offers a promising alternative to nonlinear optical devices for optical logic processing.
    • Fiber design itself can be leveraged for advanced nonlinear logical processing capabilities.