Optimal span length in high-speed transmission systems with hybrid Raman-erbium-doped fiber amplification

Juan Diego Ania-Castañón*, Itina O. Nasieva, Sergei K. Turitsyn, Nicolas Brochier, Erwan Pincemin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We show, using nonlinearity management, that the optimal performance in high-bit-rate dispersion-managed fiber systems with hybrid amplification is achieved for a specific amplifier spacing that is different from the asymptotically vanishing length corresponding to ideally distributed amplification [Opt. Lett. 15, 1064 (1990)]. In particular, we prove the existence of a nontrivial optimal span length for 40-Gbit/s wavelength-division transmission systems with Raman-erbium-doped fiber amplification. Optimal amplifier lengths are obtained for several dispersion maps based on commonly used transmission fibers. © 2005 Optical Society of America.

Original languageEnglish
Pages (from-to)23-25
Number of pages3
JournalOptics Letters
Issue number1
Publication statusPublished - 1 Jan 2005

Bibliographical note

© 2005 Optical Society of America
This paper was published in Optics letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-1-23. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.


  • high-bit-rate dispersion-managed fiber systems
  • hybrid amplification
  • asymptotically vanishing length
  • nontrivial optimal span length
  • 40-Gbit/s wavelength
  • Raman-erbium-doped fiber amplification


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