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Compact dynamic optical isolator based on tandem phase modulators.

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    New dynamic optical isolators use advanced modulators for smaller, more efficient integrated photonics. This innovation reduces device size without needing higher modulation frequencies.

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    Area of Science:

    • Integrated photonics
    • Optoelectronics
    • Materials science

    Background:

    • Dynamic optical isolators offer a complementary metal-oxide-semiconductor (CMOS)-compatible solution for optical isolation in integrated photonics.
    • Device size is currently limited by optical modulation frequency and strength.

    Purpose of the Study:

    • To investigate a modified tandem modulator design for dynamic optical isolators.
    • To leverage recent advancements in modulator technology for improved device performance.

    Main Methods:

    • Modification of a previously proposed tandem modulator design.
    • Analysis of isolator performance with large modulation strength (refractive index modulation up to unity) at gigahertz frequencies.

    Main Results:

    • The modified design allows for significant reduction in device length.
    • This reduction is achieved without increasing the modulation frequency.

    Conclusions:

    • The proposed modification enhances dynamic optical isolator designs.
    • This advancement offers a more compact and efficient approach to optical isolation in integrated photonic circuits.