Ultra-long Raman fibre laser transmission links

Vasileios Karalekas*, Juan Diego Ania-Castañón, Paul Harper, Sergei K. Turitsyn

*Corresponding author for this work

Research output: Chapter in Book/Published conference outputConference publication


In this paper we review some recent results related to the application of ultra-long Raman fibre laser (URFL) cavities to quasi-lossless optical signal transmission. In an URFL, the transmission fibre itself is contained inside a laser cavity delimited by two fibre Bragg gratings, allowing for a more efficient distribution of the Raman gain to the transmitted signal. We explore the unique properties of these URFLs experimentally, showing the excellent agreement with numerical predictions. URFL schemes can provide reduced signal power excursion (<0.98 dB in 75 km of SMF), and improved OSNR performance compared to conventional distributed Raman and lumped amplification. We also analyze the possibility of achieving simultaneous spatio-spectral transparency in optical fibre. Thanks to their unique properties, URFLs are ideal candidates for quasi-lossless DWDM signal transmission, soliton transmission and nonlinear optical signal processing.

Original languageEnglish
Title of host publicationICTON 2009: 11th International Conference on Transparent Optical Networks
ISBN (Print)9781424448265
Publication statusPublished - 18 Nov 2009
EventICTON 2009: 11th International Conference on Transparent Optical Networks - Ponta Delgada, United Kingdom
Duration: 28 Jun 20092 Jul 2009


ConferenceICTON 2009: 11th International Conference on Transparent Optical Networks
Country/TerritoryUnited Kingdom
CityPonta Delgada


  • Cross-domain transparency
  • Effective reflectivity
  • Lossless transmission
  • Raman amplification
  • Raman fibre lasers


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