Optical turbulence and spectral condensate in long fibre lasers

Elena Turitsyna, Gregory Falkovich, Atalla El-Taher, Xuewen Shu, Paul Harper, Sergei Turitsyn

Research output: Contribution to journalArticlepeer-review


We study numerically optical turbulence using the particular example of a recently
created, ultra-long fibre laser. For normal fibre dispersion, we observed an intermediate state with an extremely narrow spectrum (condensate), which experiences instability and a sharp transition to a fluctuating regime with a wider spectrum. We demonstrate that the number of modes has an impact on the condensate’s lifetime. The smaller the number of modes, the more resistant is the condensate to perturbations. Experimental results show a good agreement with numerical simulations.
Original languageEnglish
Pages (from-to)2496-2508
Number of pages14
JournalProceedings of the Royal Society: Series A
Issue number2145
Early online date2 May 2012
Publication statusPublished - 8 Sept 2012

Bibliographical note

© 2012 The Royal Society
This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


  • optical turbulence
  • Raman fibre lasers
  • nonlinear optics
  • spectral condensate


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