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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 2, Iss. 4 — Apr. 1, 1985
  • pp: 515–521

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

Masataka Nakazawa, Takashi Nakashima, and Shigeyuki Seikai  »View Author Affiliations

JOSA B, Vol. 2, Issue 4, pp. 515-521 (1985)

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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 × 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 1.42-μm signal pulse, where the pump power is 35 W and the interaction length is 100 m. A 3-dB Raman gain at 1.51 μm 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.

© 1985 Optical Society of America

Original Manuscript: September 6, 1984
Manuscript Accepted: December 13, 1984
Published: April 1, 1985

Masataka Nakazawa, Takashi Nakashima, and Shigeyuki Seikai, "Raman amplification in 1.4–1.5-μm spectral region in polarization-preserving optical fibers," J. Opt. Soc. Am. B 2, 515-521 (1985)

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