Semiconductor Raman amplifier for terahertz bandwidth optical communication

Ken Suto, Takao Saito, Tomoyuki Kimura, Jun Ichi Nishizawa, Tadao Tanabe

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


Semiconductor Raman amplifiers are useful for frequency selection in terahertz bandwidth and wavelength division multiplexing (WDM) systems with terabit capacity, as well as direct terabit optical communication systems. We have developed GaP-AlGaP Raman waveguides with micrometer-size cross sections. We have reduced residual optical loss of the waveguide by improvement of the fabrication process and realized a low-loss waveguide that is 10-mm long, which has a continuous wave (CW) Raman gain of 3.7 dB. Also, the time-gated amplification with 80-ps pulse pumping is performed and 20-dB gain is obtained. These performances are very suitable for light frequency selection in terahertz bandwidth and WDM optical communication systems.

Original languageEnglish
Pages (from-to)705-711
Number of pages7
JournalJournal of Lightwave Technology
Issue number4
Publication statusPublished - 2002 Apr
Externally publishedYes


  • GaP
  • Raman amplifier
  • Raman laser
  • Semiconductor waveguide
  • Terabit
  • Terahertz bandwidth
  • Wavelength division multiplexing (WDM)

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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