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  3. Slow-light Silicon Modulator With 110-ghz Bandwidth.
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  3. Slow-light Silicon Modulator With 110-ghz Bandwidth.

Related Experiment Video

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Slow-light silicon modulator with 110-GHz bandwidth.

Changhao Han1, Zhao Zheng1, Haowen Shu1,2,3

  • 1State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics, Peking University, Beijing 100871, China.

Science Advances
|October 20, 2023

View abstract on PubMed

Summary
This summary is machine-generated.

Researchers developed a compact silicon modulator that achieves 110 gigahertz bandwidth, overcoming previous limitations. This breakthrough enables 112 gigabits per second operation for advanced optical interconnection and machine learning applications.

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Area of Science:

  • Photonics
  • Integrated Optics
  • Materials Science

Background:

  • Silicon modulators are crucial for integrating electro-optic functions in devices.
  • Current silicon modulators face a bandwidth ceiling, hindering Tbps-level throughput.
  • Overcoming this bandwidth limitation is essential for next-generation optical communication.

Purpose of the Study:

  • To demonstrate a novel silicon modulator design that surpasses existing bandwidth limitations.
  • To achieve ultrahigh modulation bandwidth for high-throughput data transmission.
  • To explore the potential of silicon photonics in demanding applications.

Main Methods:

  • Utilized a cascade corrugated waveguide architecture to induce a slow-light effect.
  • Optimized modulator design to balance efficiency, size, and bandwidth.
  • Fabricated and tested a compact pure silicon modulator.

    • Main Results:

    • Achieved a record bandwidth of 110 gigahertz.
    • Demonstrated 112 gigabits per second on-off keying operation.
    • The modulator has a compact length of 124 micrometers.

    Conclusions:

    • Silicon modulators capable of 110 gigahertz bandwidth are feasible.
    • The slow-light effect in corrugated waveguides is key to high bandwidth.
    • This technology has significant potential for optical interconnects and photonic machine learning.