Long-reach 100 Gbit Ethernet light source based on 4 × 25-Gbit/s 1.3-μm InGaAlAs EADFB lasers

Takeshi Fujisawa, Kiyoto Takahata, Takashi Tadokoro, Wataru Kobayashi, Akira Ohki, Naoki Fujiwara, Shigeru Kanazawa, Takayuki Yamanaka, Fumiyoshi Kano

Research output: Contribution to journalArticle

4 Citations (Scopus)


High-performance 1.3-μm electroabsorption modulators integrated with DFB lasers are developed for long-reach 100 Gbit Ethernet. The dynamic extinction ratio of over 8-dB with the voltage swing of 2 V are achieved for the four LAN-WDM lanes (14 nm wavelength range) used in 100 Gbit Ethernet with the same modulator structure. The fabricated devices are packaged in butterfly modules and four-lane 40-km single mode fiber transmission at 25-Gbit/s operation is demonstrated. Further, a can-type transmitter optical subassembly is fabricated to reduce the cost and size of transmitter modules. The use of a low-dielectric-constant liquid crystal polymer transmission line makes the 3-dB bandwidth larger and enables 25-Gbit/s operation with CAN-TOSA module.

Original languageEnglish
Pages (from-to)1167-1172
Number of pages6
JournalIEICE Transactions on Electronics
Issue number7
Publication statusPublished - 2011 Jul



  • 100 Gbit Ethernet
  • Can-type package
  • Electroabsorption modulator
  • Transmitter optical subassembly

ASJC Scopus subject areas

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

Cite this

Fujisawa, T., Takahata, K., Tadokoro, T., Kobayashi, W., Ohki, A., Fujiwara, N., Kanazawa, S., Yamanaka, T., & Kano, F. (2011). Long-reach 100 Gbit Ethernet light source based on 4 × 25-Gbit/s 1.3-μm InGaAlAs EADFB lasers. IEICE Transactions on Electronics, E94-C(7), 1167-1172. https://doi.org/10.1587/transele.E94.C.1167