Electroabsorption modulator integrated light sources for future high-speed ethernet

Takeshi Fujisawa*, Shigeru Kanazawa, Kiyoto Takahata, Hiroyuki Ishii

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Recent progress in electroabsorption modulator integrated distributed feedback (EADFB) lasers for high-speed data communications is described. For 100 Gigabit Ethernet (100GbE) applications, an ultrasmall optical semiconductor chip, in which four 1.3-μm 25-Gbit/s EADFB lasers and an optical multiplexer are monolithically integrated, has been developed for future 100GbE transceivers. This small chip enables the overall transmitter size and the number of optical components to be significantly reduced compared with conventional 100GbE transmitters. Furthermore, for future beyond-100-Gbit/s applications, we have developed 50-Gbit/s EADFB lasers and obtained very clear eye openings even after 40-km transmission.

Original languageEnglish
JournalNTT Technical Review
Issue number12
Publication statusPublished - 2012 Dec
Externally publishedYes

ASJC Scopus subject areas

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


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