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Quasi-light Storage for Optical Data Packets
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High-speed silicon modulator with band equalization.

Hao Xu, Xianyao Li, Xi Xiao

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    Summary
    This summary is machine-generated.

    Silicon Mach-Zehnder modulators achieve 70 Gbit/s electro-optic modulation. Optimized input impedance broadens the frequency response, enabling high-speed optical communication.

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    Area of Science:

    • Photonics and Optoelectronics
    • Integrated Silicon Photonics

    Background:

    • High-speed electro-optic modulators are crucial for modern optical communication systems.
    • Silicon Mach-Zehnder modulators offer a promising platform due to CMOS compatibility and scalability.
    • Achieving wide bandwidth and high modulation speeds remains a key challenge.

    Purpose of the Study:

    • To demonstrate high-speed electro-optic modulation using a silicon Mach-Zehnder modulator.
    • To design an increasing input impedance for frequency response equalization.
    • To predict and verify the modulator's bandwidth performance under varying bias conditions.

    Main Methods:

    • Fabrication of a silicon Mach-Zehnder modulator.
    • Implementation of an increasing input impedance design for frequency response equalization.
    • Experimental measurement of electro-optic modulation speed and 3 dB bandwidth.
    • Testing frequency responses with counter-propagating waves for model verification.

    Main Results:

    • Demonstrated electro-optic modulation up to 70 Gbit/s at -1.5 V bias.
    • Measured 3 dB bandwidth of 35 GHz without bias voltage.
    • Predicted bandwidth up to 55 GHz at -3 V bias.
    • Validated a prediction model for modulator frequency response.

    Conclusions:

    • The silicon Mach-Zehnder modulator achieves high-speed modulation performance.
    • The designed input impedance effectively equalizes the electro-optic frequency response.
    • The device shows potential for advanced optical communication applications.