Internal bandwidth equalization in a CMOS-compatible si-ring modulator

Douglas M. Gill, Mahmoud Rasras, Kun Yii Tu, Young Kai Chen, Alice E. White, Sanjay S. Patel, Daniel Carothers, Andrew Pomerene, Robert Kamocsai, Craig Hill, James Beattie

Research output: Contribution to journalArticlepeer-review


Bandwidth equalization using a simple complementary metal-oxide- semiconductor-compatible tunable silicon-ring modulator is shown.We demonstrate >35-GHz small signal bandwidth and use the resonator to mitigate bandwidth limitations from other measurement system components. Configuring the optical carrier to be OFF resonance within the ring free-spectral range allows high-frequency enhancement and low-frequency suppression of the S21 parameter to achieve system response equalization. Our results suggest that the carrier and modulation sidebands can have very different transient characteristics within the ring modulator.

Original languageEnglish (US)
Pages (from-to)200-202
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number4
StatePublished - Feb 15 2009


  • Fiber-optics communications
  • Integrated optics devices

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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