Integrated lithium niobate Mach-Zehnder interferometers for advanced modulation formats

Tetsuya Kawanishi*, Takahide Sakamoto, Akito Chiba

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


We present recent progress of high-speed Mach-Zehnder modulator technologies for advanced modulation formats. Multi-level quadrature amplitude modulation signal can be synthesized by using parallel Mach-Zehnder modulators. We can generate complicated multi-level optical signals from binary data streams, where binary modulated signals are vectorially summed in optical circuits. Frequency response of each Mach-Zehnder interferometer is also very important to achieve high-speed signals. We can enhance the bandwidth of the response, with thin substrate. 87 Gbaud modulation was demonstrated with a dual-parallel Mach- Zehnder modulator.

Original languageEnglish
Pages (from-to)915-921
Number of pages7
JournalIEICE Transactions on Electronics
Issue number7
Publication statusPublished - 2009
Externally publishedYes


  • Lithium niobate
  • Mach-Zehnder interferometer
  • Optical modulator
  • Quadrature amplitude modulation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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