Characterization of ultra-long Raman fibre lasers

Sergei A. Babin, Vassileios Karalekas, E.V. Podivilov, Vladimir K. Mezentsev, Paul Harper, Juan D. Ania-Castañón, Sergei K. Turitsyn

Research output: Chapter in Book/Published conference outputConference publication


We present results on characterization of lasers with ultra-long cavity lengths up to 84km, the longest cavity ever reported. We have analyzed the mode structure, shape and width of the generated spectra, intensity fluctuations depending on length and intra-cavity power. The RF spectra exhibit an ultra-dense cavity mode structure (mode spacing is 1.2kHz for 84km), in which the width of the mode beating is proportional to the intra-cavity power while the optical spectra broaden with power according to the square-root law acquiring a specific shape with exponential wings. A model based on wave turbulence formalism has been developed to describe the observed effects.
Original languageEnglish
Title of host publicationFiber lasers V
Subtitle of host publicationtechnology, systems, and applications
EditorsJes Broeng, Clifford Headley
Number of pages9
ISBN (Print)978-0-8194-7048-5
Publication statusPublished - 2 Apr 2008
EventFiber lasers V: technology, systems, and applications - San Jose, CA, United States
Duration: 21 Jan 200824 Jan 2008


ConferenceFiber lasers V: technology, systems, and applications
Country/TerritoryUnited States
CitySan Jose, CA

Bibliographical note

Babin, Sergei A.; Karalekas, Vassileios; Podivilov, E.V.; Mezentsev, Vladimir K.; Harper, Paul; Ania-Castañón, Juan D.; Turitsyn, Sergei K., "Characterization of ultra-long Raman fibre lasers". Fiber lasers V: technology, systems, and applications., ed. Jes Broeng; Clifford Headley. Vol. 6873 SPIE, 2008. p. U334-U342.

Copyright 2008 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.


  • fibre laser
  • Raman
  • ultra-long
  • mode structure
  • spectral broadening
  • wave turbulence


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