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Related Experiment Video

Updated: Mar 11, 2026

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Compact silicon photonic resonance-sssisted variable optical attenuator.

Xiaoxi Wang, Ryan Aguinaldo, Anthony Lentine

    Optics Express
    |December 2, 2016
    PubMed
    Summary
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    This study presents a compact silicon photonic variable optical attenuator. It achieves a high extinction ratio using a p-i-n waveguide and a microring filter, leveraging thermal resonance for enhanced performance.

    Area of Science:

    • Photonics
    • Optical Engineering
    • Materials Science

    Background:

    • Silicon photonics enables compact optical devices.
    • Variable optical attenuators (VOAs) are crucial for optical networks.
    • High extinction ratios are essential for signal integrity.

    Purpose of the Study:

    • To demonstrate a novel two-part silicon photonic variable optical attenuator.
    • To achieve a high extinction ratio across a broad wavelength range (1520-1620 nm).
    • To investigate the use of thermal resonance for VOA enhancement.

    Main Methods:

    • Fabrication of a two-part device: p-i-n waveguide followed by a microring filter.
    • Utilizing current injection in the p-i-n junction to generate heat.
    • Employing thermal resonance shift in the microring for optical attenuation.

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  • Developing a thermal-resistance model to explain the observed effects.

    • Main Results:

    • Demonstration of a compact silicon photonic VOA.
    • Achieved high extinction ratios between 1520 nm and 1620 nm.
    • Successfully utilized harvested heat for thermal resonance shift and optical attenuation.
    • Validated the thermal-resistance model for device performance.

    Conclusions:

    • The demonstrated two-part silicon photonic VOA offers a compact and efficient solution.
    • The integration of a microring filter with thermal resonance provides enhanced optical attenuation.
    • The findings contribute to the development of advanced optical communication components.