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Published on: November 30, 2012
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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
Summary
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.
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.
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