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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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A compact thermo-optical multimode-interference silicon-based 1 × 4 nano-photonic switch.

Haifeng Zhou, Junfeng Song, Edward K S Chee

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    Summary
    This summary is machine-generated.

    This study demonstrates an ultra-compact nano-photonic switch using silicon thermo-optical effects. The device achieves low insertion loss and high extinction ratios for efficient optical signal routing.

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    Area of Science:

    • Photonics
    • Nanotechnology
    • Optical Engineering

    Background:

    • Multimode interference (MMI) devices are crucial for optical signal management.
    • Silicon photonics offers a scalable platform for integrated optical circuits.
    • Thermo-optical effects provide a viable mechanism for active control in photonic devices.

    Purpose of the Study:

    • To demonstrate an ultra-compact 1x4 nano-photonic switch.
    • To leverage silicon thermo-optical effects for switch operation.
    • To characterize the performance of MMI-based photonic switches.

    Main Methods:

    • Fabrication of an MMI-based 1x4 photonic switch on a silicon-on-insulator (SOI) platform.
    • Systematic characterization of constituent components: 1x4 power splitter, 4x4 MMI coupler, and thermo-optical heaters.
    • Development of a model to estimate power consumption and analyze MMI coupler imbalance effects.

    Main Results:

    • Achieved an average insertion loss of 1.7 dB across different switching states at 1550 nm.
    • Demonstrated a transmission imbalance of 1.05 dB.
    • Reported a worst-case extinction ratio of 11.48 dB and crosstalk of -11.38 dB.

    Conclusions:

    • The developed MMI-based nano-photonic switch exhibits promising performance for optical switching applications.
    • The silicon thermo-optical effect is effectively utilized for compact and efficient photonic switching.
    • The established model provides valuable insights into power consumption and performance limitations.