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Broadband three-dimensional multi-beam splitter enabled by quasi-parallel scanning.

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    We developed a new 3D multi-way beam splitter using femtosecond laser technology. This advanced photonic device offers high uniformity and broad bandwidth for enhanced optical computing and communication systems.

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    Area of Science:

    • Photonics
    • Optical Engineering
    • Materials Science

    Background:

    • On-chip photonic systems are crucial for advanced information processing.
    • Conventional beam splitters face limitations like polarization dependence and poor uniformity.
    • Multi-way beam splitting is key to increasing parallelism and processing capacity.

    Purpose of the Study:

    • To develop a novel 3D multi-way beam splitter.
    • To overcome the limitations of conventional beam splitters.
    • To enhance performance for on-chip optical systems.

    Main Methods:

    • Fabrication using a femtosecond-laser-based quasi-parallel scanning technique.
    • Development of three-dimensional (3D) structures for beam splitting.
    • Characterization of splitter performance including uniformity and bandwidth.

    Main Results:

    • Achieved high uniformity in beam splitting, up to 92.62%.
    • Demonstrated a broad operational bandwidth from 750 to 1050 nm.
    • Successfully fabricated 3D multi-way splitters with improved characteristics.

    Conclusions:

    • The femtosecond laser technique provides a viable method for creating high-performance 3D photonic splitters.
    • This technology promises significant advancements for optical computing, sensing, and quantum photonic systems.
    • The developed splitters address key challenges in integration density and device uniformity.