Multiwavelength NRZ-to-RZ conversion with significant timing-jitter suppression and SNR improvement

Jacob Lasri*, Preetpaul Devgan, Vladimir S. Grigoryan, Prem Kumar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


We demonstrate a novel, polarization-insensitive scheme for multiwavelength nonreturn-to-zero to return-to-zero format conversion at 10 Gb/s rate with significant timing-jitter suppression and signal-to-noise ratio improvement. The scheme utilizes a self-starting electroabsorption-modulator based optoelectronic oscillator that simultaneously generates a 10 GHz-rate microwave signal and a train of 15 ps-wide optical pulses with ∼40 fs timing jitter (100-10 MHz range). Under direct optical injection locking of the oscillator with an incoming data stream, we demonstrate the extraction of a high-quality clock that enables in-line format conversion of multiple, synchronized nonreturn-to-zero channels.

Original languageEnglish (US)
Pages (from-to)293-298
Number of pages6
JournalOptics Communications
Issue number4-6
StatePublished - Oct 15 2004


  • Electroabsorption modulator
  • Format conversion
  • Optical communication
  • Optoelectronic oscillator
  • Timing jitter

ASJC Scopus subject areas

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

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