High-performance InP-based optical modulators

Takayuki Yamanaka, Ken Tsuzuki, Nobuhiro Kikuchi, Hideki Fukano

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We have developed two types of high-speed semiconductor optical modulators operating at 40 Gbit/s with reduced driving voltage. One is a compact Mach-Zehnder modulator module. The modulator chip has an n-i-n isotype heterostructure for high-speed and low-driving-voltage operation. We obtained error-free operation in a push-pull configuration with a peak-to-peak voltage of 1.3 V. The other is an electroabsorption modulator integrated with microwave coplanar waveguides. A narrow core buried with polyimide provides a steady large extinction ratio and a 3-dB-down frequency as large as 46 GHz. The fabricated modulator operates at a driving voltage as low as 0.79 V.

Original languageEnglish
Pages (from-to)39-44
Number of pages6
JournalNTT Technical Review
Issue number7
Publication statusPublished - Jul 1 2006
Externally publishedYes

ASJC Scopus subject areas

  • Computer Science Applications
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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