Coherent FSK transmission experiment using Brillouin amplification in a single-mode fiber

Makoto Tsubokawa, Yutaka Sasaki

Research output: Contribution to journalArticle

2 Citations (Scopus)


Optical heterodyne FSK system experiment with Brillouin amplifier is demonstrated using a CW pump of a DFB-LD operating at the 1.54 μm wavelength. The 30 Mbit/s coherent FSK signal is amplified by 4 dB through 52 km single-mode fiber when the pump power of 2.5 mW is injected into the fiber. To obtain the flat gain profile ranging over the signal bandwidth, Brillouin gain bandwidth is broadened by means of modulating the pump frequency. Bit-error-rate performance is improved to reduce the rate by a factor of ten with the amplifier. Brillouin amplifier is useful for transmission systems at a bit-rate of less than 1 Gbit/s, as opposed to a fiber Raman amplifier.

Original languageEnglish
Pages (from-to)42-47
Number of pages6
JournalJournal of Optical Communications
Issue number2
Publication statusPublished - 1989 Jun
Externally publishedYes


ASJC Scopus subject areas

  • Computer Networks and Communications
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this