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Related Experiment Video

Updated: Nov 30, 2025

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Gamma radiation effects on passive silicon photonic waveguides using phase sensitive methods.

Nicholas Boynton, Michael Gehl, Christina Dallo

    Optics Express
    |November 13, 2020
    PubMed
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    Silicon photonic waveguides show slightly increased propagation loss after gamma radiation exposure up to 100 krad (Si). Heat treatment can improve performance, making these integrated circuits suitable for harsh environments.

    Area of Science:

    • Materials Science
    • Photonics
    • Radiation Physics

    Background:

    • Silicon photonics are crucial for integrated circuits in demanding environments like space.
    • Understanding radiation effects on photonic waveguides is essential for reliability.

    Purpose of the Study:

    • To investigate the impact of gamma radiation on passive silicon photonic waveguides.
    • To characterize changes in propagation loss and group index.
    • To explore methods for mitigating radiation-induced degradation.

    Main Methods:

    • Exposure of silicon photonic waveguides to gamma radiation.
    • Utilizing a phase-sensitive swept-wavelength interferometric method.
    • Characterizing propagation loss and group index before and after irradiation.

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    Last Updated: Nov 30, 2025

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    Main Results:

    • Slight increase in propagation loss observed up to 100 krad (Si).
    • Negligible changes in group index were measured.
    • Post-exposure degradation was successfully improved via heat treatment.

    Conclusions:

    • Passive silicon photonic waveguides exhibit moderate radiation tolerance.
    • Heat treatment offers a viable solution for restoring performance after radiation exposure.
    • These findings support the use of silicon photonics in radiation-intensive applications.