20-Gb/s QPSK transmission over 10-km-long holey fiber using a wavelength tunable quantum dot light source in O-band

Akihiro Murano, Fumiya Yagi, Naokatsu Yamamoto, Atsushi Kanno, Tetsuya Kawanishi, Hideyuki Sotobayashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


We successfully demonstrate 20-Gb/s quadrature phase-shift keying (QPSK) signal transmission. The transmission was carried out over endlessly single-mode holey fiber in the waveband of 1276.02-1304.26 nm, whose bandwidth of 5.09- THz is broader than the traditional C-band. A wavelength-tunable quantum dot (QD) laser with broad wavelength tunability helps realize bandwidth availability. A single InAs/InGaAs QD optical gainchip was grown using a sandwiched sub-nanometer separator technique in the wavelength of 1.3-μm band. Using this gain chip, the QD light source has good wavelength stability, compactness and wavelength tunablility. The measured transmission results show bit error rates within a forward error correction limit of 2×10-3 using intradyne coherent detection with offline digital signal processing. In this study, it is expected that abundant frequency resources such as the O-band are coherently enhanced by the use of a large number of wavelength channels by effectively using the QD- laser.

Original languageEnglish
Title of host publicationOptical Metro Networks and Short-Haul Systems VII
EditorsAtul K. Srivastava, Benjamin B. Dingel, Achyut K. Dutta
ISBN (Electronic)9781628414783
Publication statusPublished - 2015
Externally publishedYes
EventOptical Metro Networks and Short-Haul Systems VII - San Francisco, United States
Duration: 2015 Feb 102015 Feb 12

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherOptical Metro Networks and Short-Haul Systems VII
Country/TerritoryUnited States
CitySan Francisco


  • Holey fiber
  • Optical communication
  • Optical transmission system
  • Quadrature phase-shift keying (QPSK)
  • Quantum dot

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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