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Related Concept Videos

Passive Filters01:27

Passive Filters

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Broadband tunable filter based on the loop of multimode Bragg grating.

Jianfei Jiang, Huiye Qiu, Gencheng Wang

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    |January 13, 2018
    PubMed
    Summary
    This summary is machine-generated.

    A novel silicon filter on a silicon-on-insulator platform offers broadband tunability up to 1.455 THz. This tunable waveguide Bragg grating filter enables simultaneous wavelength tuning without free-space limitations.

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    Area of Science:

    • Photonics
    • Integrated Optics
    • Semiconductor Devices

    Background:

    • Silicon photonics is crucial for optical communication and signal processing.
    • Tunable filters are essential components for wavelength-selective optical networks.
    • Existing tunable filters often face limitations in bandwidth, tuning range, or complexity.

    Purpose of the Study:

    • To demonstrate a broadband tunable silicon filter.
    • To investigate the performance of a multimode anti-symmetric waveguide Bragg grating.
    • To achieve wide bandwidth tunability and simultaneous wavelength tuning.

    Main Methods:

    • Fabrication of a tunable filter on a silicon-on-insulator (SOI) platform.
    • Utilizing a loop of multimode anti-symmetric waveguide Bragg grating.
    • Characterization of the filter's bandwidth tunability and out-of-band contrast.

    Main Results:

    • Achieved a wide bandwidth tunability of 1.455 THz, spanning from 0.117 THz to 1.572 THz.
    • Demonstrated simultaneous wavelength tuning for both drop and through ports.
    • Obtained a high out-of-band contrast of 30 dB at 1.572 THz (13 nm) and 18 dB at 0.117 THz (1.0 nm).

    Conclusions:

    • The demonstrated silicon filter offers significant broadband tunability and wavelength tuning capabilities.
    • The device architecture is suitable for applications requiring flexible wavelength selection in integrated photonic systems.
    • The filter's performance highlights the potential of waveguide Bragg gratings for advanced optical signal processing.