Direct measurement of chirp parameters of high-speed Mach-Zehnder-type optical modulators

Tetsuya Kawanishi*, Kenji Kogo, Satoshi Oikawa, Masayuki Izutsu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

69 Citations (Scopus)


A method is described for measuring the chirp parameters and optical responses of Mach-Zehnder-type optical modulators by using an optical spectrum analyzer. The chirp parameter and the optical response for small-signal operation are expressed by the magnitude of the phase induced in each optical path of the Mach-Zehnder waveguides. The induced phase can be obtained from the ratio of the high-order optical harmonic intensities generated by large-signal operation in the millimeter-wave region. This method permits the chirp parameter to be evaluated at a specific frequency, while it is assumed to be independent of the frequency of the applied electric rf signal in the conventional method.

Original languageEnglish
Pages (from-to)399-404
Number of pages6
JournalOptics Communications
Issue number5-6
Publication statusPublished - 2001 Aug 15
Externally publishedYes


  • Chirp parameter
  • Mach-Zehnder structure
  • Optical harmonics
  • Optical modulator

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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