Measurement of small chirp-parameter for Mach-Zehnder-type optical modulator

Akira Enokihara*, Tetsuya Kawanishi, Hiroshi Murata, Yasuyuki Okamura, Masayuki Izutsu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


A new measurement method of chirp-parameters is proposed for electro-optic (EO) intensity modulators with the Mach-Zehnder (MZ) waveguide interferometer. This method is suitably applied for the measurement of the small chirp with operation at a specific RF-frequency. To determine the chirp-parameter, optical spectrum components of the modulated light are observed with varying the relative optical phase difference between the two arms of the MZ waveguide interferometer. The chirp-parameter of 0.17, which is a value small enough for EO intensity modulation, was successfully measured by the experiment.

Original languageEnglish
Pages (from-to)4229-4232
Number of pages4
JournalOptics Communications
Issue number21
Publication statusPublished - 2009 Nov 1
Externally publishedYes


  • Chirp-parameter
  • Mach-Zehnder interferometer
  • Optical modulator
  • Optical spectrum

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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