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Coupled-ring-resonator-based silicon modulator for enhanced performance.

Yunchu Li1, Lin Zhang, Muping Song

  • 1Dept of Electrical Engineering, Univ of Southern California, Los Angeles, CA 90089, USA. yunchuli@usc.edu

Optics Express
|August 20, 2008
PubMed
Summary
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A novel silicon coupled-ring modulator achieves high-speed modulation for optical communications. This design offers improved performance, including higher data rates and enhanced dispersion tolerance, making it suitable for advanced photonic systems.

Area of Science:

  • Photonics
  • Optical Communications
  • Integrated Optics

Background:

  • Ring modulators are crucial components in optical communication systems.
  • Existing designs face limitations in modulation speed, power consumption, and dispersion tolerance.

Purpose of the Study:

  • To propose and simulate a compact silicon coupled-ring modulator structure.
  • To enhance modulation speed and improve performance metrics for optical modulators.

Main Methods:

  • A silicon coupled-ring modulator with one actively driven ring coupled to a waveguide was designed.
  • Electromagnetic simulations were performed to analyze the modulator's characteristics.

Main Results:

  • The proposed structure enables potentially 60-Gb/s non-return-to-zero (NRZ) modulation with over 20-dB extinction ratio.

Related Experiment Videos

  • Frequency chirp is adjustable by varying the inter-ring coupling coefficient.
  • Dispersion tolerance for a 40-Gb/s NRZ signal is extended from 18 to 85 ps/nm.

    • Conclusions:

    • The compact silicon coupled-ring modulator offers significant advantages for high-speed optical communication.
    • The design demonstrates potential for improved data rates, reduced power consumption, and better dispersion tolerance.