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Asymmetric optical multimode splitters by field-assisted ion exchange using patterned mask openings.

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    |October 27, 2022
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    Fabricated asymmetric optical multimode splitters using ion exchange demonstrate potential for high-speed data transmission. These devices, based on optical waveguides with varying widths, are suitable for bandwidths up to 28 GBit/s.

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    Area of Science:

    • Photonics and optical engineering.
    • Materials science for optical devices.

    Background:

    • Optical multimode splitters are key components in photonic integrated circuits.
    • Achieving asymmetry in splitters is crucial for advanced optical signal processing.

    Purpose of the Study:

    • To fabricate and characterize asymmetric optical multimode splitters using field-assisted ion exchange.
    • To investigate the effect of waveguide width on splitter performance.
    • To assess the suitability of these splitters for high-bandwidth data transmission.

    Main Methods:

    • Fabrication of optical waveguides in glass substrates via field-assisted ion exchange.
    • Utilizing different mask opening geometries to control waveguide width and asymmetry.
    • Optical characterization including loss and splitting ratio measurements at 850 nm.
    • Data transmission testing to evaluate bandwidth capabilities.

    Main Results:

    • Successfully fabricated asymmetric optical multimode splitters with varying waveguide widths.
    • Optical losses and splitting ratios were determined at 850 nm.
    • Demonstrated suitability for data transmission up to 28 GBit/s.

    Conclusions:

    • Field-assisted ion exchange is an effective method for fabricating asymmetric optical splitters.
    • Waveguide width is a critical parameter for achieving desired asymmetry and performance.
    • The fabricated splitters show promise for high-speed optical communication systems.