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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 21,
  • Issue 8,
  • pp. 1742-
  • (2003)

New Raman Pump Module for Reducing Pump-Signal Four-Wave-Mixing Interaction in Co-Pumped Distributed Raman Amplifiers

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Abstract

We propose a new Raman pump module that effectively reduces four-wave-mixing (FWM) nonlinear interaction among longitudinal pump modes and wavelength-division-multiplexed (WDM) signals in co-pumped distributed Raman amplifiers based on nonzero dispersion-shifted fibers (NZ-DSFs). Theory and experiments confirm that the proposed pump module structure, based on polarization-and wavelength-multiplexed Fabry-Pérot lasers, allows distributed amplification with high co-propagating on-off Raman gain, providing a key technology for all-Raman-based dense-WDM ultralong-haul transmission.

© 2003 IEEE

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