Simple, low fluctuation voltage signal generation for 8-Gb/s quadrature amplitude modulation using dual-parallel Mach-Zehnder modulator

Akito Chiba, Takahide Sakamoto, Tetsuya Kawanishi, Masayuki Izutsu

Research output: Contribution to journalArticle

3 Citations (Scopus)


Optical quadrature amplitude modulation (QAM) has attracted considerable attention because of its high spectral efficiency. For high capacity, the modulation rate should also be enhanced, which requires the generation of high-baud-rate multilevel electric signals with high precision in amplitude. In this paper, we describe a method to reduce the amplitude fluctuation of the electric signal by adopting a return-to-zero (RZ) format. We also demonstrate 2.0-Gbaud optical QAM signal generation with a conventional dual-parallel Mach-Zehnder modulator (DPMZM) driven by the electric RZ data signals.

Original languageEnglish
Pages (from-to)497-502
Number of pages6
Journalieice electronics express
Issue number14
Publication statusPublished - 2008 Jul 25



  • Advanced modulation format
  • Lithium niobate optical modulator
  • Optical I-Q modulation
  • Optical quadrature amplitude modulation
  • Patterning effect suppression

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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