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Related Concept Videos

Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

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In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
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Related Experiment Video

Updated: Apr 6, 2026

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
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5 x 20 Gb/s heterogeneously integrated III-V on silicon electro-absorption modulator array with arrayed waveguide

Xin Fu, Jianxin Cheng, Qiangsheng Huang

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    Summary

    We developed a compact five-channel wavelength division multiplexed modulator module. This device integrates a silicon multiplexer and electro-absorption modulators, enabling 100 Gbps data transmission.

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    Area of Science:

    • Photonics and Optical Communications
    • Integrated Photonics
    • Semiconductor Devices

    Background:

    • Increasing demand for higher data transmission rates in optical networks.
    • Need for compact and high-capacity optical modulator modules.
    • Challenges in integrating multiplexers and modulators efficiently.

    Purpose of the Study:

    • To demonstrate a compact, high-capacity wavelength division multiplexed (WDM) modulator module.
    • To showcase heterogeneous integration of silicon photonics and electro-absorption modulators (EAMs).
    • To evaluate the potential for 100 Gbps transmission capacity.

    Main Methods:

    • Heterogeneous integration of a 200 GHz channel-spacing silicon arrayed-waveguide grating (AWG) multiplexer.
    • Integration of a 20 Gbps electro-absorption modulator array.
    • Fabrication of the WDM modulator module on a small footprint (1.5x0.5 mm²).

    Main Results:

    • Successful integration of a five-channel WDM multiplexer and EAM array.
    • Demonstrated potential for 100 Gbps total transmission capacity.
    • Achieved a compact module size of 1.5x0.5 mm².

    Conclusions:

    • The developed WDM modulator module shows significant promise for high-capacity optical communication systems.
    • Heterogeneous integration is an effective strategy for miniaturizing complex photonic devices.
    • The module's design supports future scaling for even higher data rates.