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Adiabatic microring modulators.

Aleksandr Biberman1, Erman Timurdogan, William A Zortman

  • 1Research Laboratory of Electronics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.

Optics Express
|February 8, 2013
PubMed
Summary
This summary is machine-generated.

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We developed a novel adiabatic microring modulator, the smallest to date, achieving high performance. This silicon photonic device offers high speed and low power consumption, surpassing existing modulators.

Area of Science:

  • Photonics
  • Materials Science
  • Electrical Engineering

Background:

  • Silicon photonic modulators are crucial for high-speed optical communication.
  • Existing designs like microdisk modulators suffer from spatial mode issues.
  • Lithium-niobate modulators offer performance but lack silicon integration advantages.

Purpose of the Study:

  • To introduce and characterize a new class of high-performance silicon photonic modulators: the adiabatic microring modulator.
  • To demonstrate the advantages of the adiabatic microring modulator over existing technologies.
  • To analyze the performance of the adiabatic microring modulator in terms of size, speed, and power consumption.

Main Methods:

  • Fabrication and experimental characterization of the adiabatic microring modulator.

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  • Utilizing a vertical PN junction and interior electrical contacts.
  • Incorporating an adiabatic transition to eliminate unwanted spatial modes.

    • Main Results:

    • Demonstrated the smallest microring modulator to date (4 μm diameter).
    • Achieved an uncorrupted free spectral range of 6.92 THz.
    • Showcased operation at 12.5 Gb/s data rates and beyond with partial doping.

    Conclusions:

    • The adiabatic microring modulator combines the benefits of speed, low power consumption, and mode purity.
    • This device represents a significant advancement in silicon photonic modulator technology.
    • Partial doping further enhances the speed of the adiabatic microring modulator.