Impact of nonlinear spectral broadening in ultra-long Raman fibre lasers

V. Karalekas*, J. D. Ania-Castañón, P. Harper, S. A. Babin, E. V. Podivilov, S. K. Turitsyn

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We present an experimental study of the impact of FWM-induced nonlinear spectral broadening on the effective reflectivity of ultra-long Raman fiber laser cavities of diverse lengths and fiber bases. We observe an exponential decay of the effective reflectivity with growing power. In standard single-mode fiber, effective reflectivity drops of up to 50% for shorter cavity lengths are observed, while the longest cavity length of 82.4km displays power leakage amounting to an effective reduction of reflectivity of approximately 30%. Using different types of fiber we examine the effect of chromatic dispersion on the Stokes wave broadening.

Original languageEnglish
Pages (from-to)16690-16695
Number of pages6
JournalOptics Express
Issue number25
Publication statusPublished - 12 Dec 2007

Bibliographical note

©2007 Optical Society of America


  • optical communication
  • ECOC


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