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The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...
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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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Silicon dual-ring modulator driven by differential signal.

Hui Yu, Marianna Pantouvaki, Peter Verheyen

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    |December 10, 2014
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    Summary
    This summary is machine-generated.

    A novel silicon dual-ring modulator offers improved optical bandwidth and higher bit rates compared to single-ring designs. This advancement comes with increased transmission penalty and radio frequency power consumption.

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    Area of Science:

    • Photonics
    • Integrated Optics
    • Semiconductor Devices

    Background:

    • Silicon photonics is crucial for high-speed optical communication.
    • Ring modulators are key components in silicon photonic integrated circuits.
    • Improving modulator performance, such as optical bandwidth and bit rate, is essential for next-generation networks.

    Purpose of the Study:

    • To investigate the performance of a silicon dual-ring modulator.
    • To compare the dual-ring modulator with a single-ring modulator.
    • To evaluate the trade-offs in terms of bandwidth, bit rate, transmission penalty, and power consumption.

    Main Methods:

    • Device fabrication and characterization of a silicon dual-ring modulator.
    • Optical and electrical performance testing using differential pseudo-random binary sequence (PRBS) signals.
    • Comparative analysis with a single-ring modulator under identical signal conditions.

    Main Results:

    • The dual-ring modulator demonstrated significantly wider optical bandwidths (66 pm at 12.5 Gb/s, 40 pm at 20 Gb/s) compared to the single-ring modulator (26 pm at 12.5 Gb/s).
    • The dual-ring modulator supported higher bit rates (up to 20 Gb/s) where the single-ring modulator's performance degraded.
    • An increase in transmission penalty (1.7 dB) and RF power consumption (twofold) was observed for the dual-ring design.

    Conclusions:

    • The silicon dual-ring modulator offers superior optical bandwidth and bit rate capabilities.
    • The enhanced performance is achieved at the cost of increased transmission penalty and power consumption.
    • This device presents a promising alternative for high-speed silicon photonic applications.