Raman amplification in 1.4-1.5-μm spectral region in polarization-preserving optical fibers

Masataka Nakazawa, Takashi Nakashima, Shigeyuki Seikai

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Saturation characteristics, polarization, and wavelength dependences of the stimulated Raman gain in polarization-preserving fibers have been studied to construct an active transmission line. In a backward-pump configuration, a Raman gain coefficient of 1.1 X 10-11 cm/W and a gain as high as 25 dB have been attained with a combination of a 1.34-μm pump and a\A2-pm signal pulse, where the pump power is 35 W and the interaction length is 100 m. A 3-dB Raman gain at 1.51 pm has also been obtained under the same conditions. It was also found that there is a nonlinear polarization mode coupling that couples the vertical axis to the pump axis. This type of nonlinear coupling seems to be large when the linear mode-coupling coefficient of the fiber is large.

Original languageEnglish
Pages (from-to)515-521
Number of pages7
JournalJournal of the Optical Society of America B: Optical Physics
Issue number4
Publication statusPublished - 1985 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics


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