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.
|Title of host publication||Fiber lasers V|
|Subtitle of host publication||technology, systems, and applications|
|Editors||Jes Broeng, Clifford Headley|
|Number of pages||9|
|Publication status||Published - 2 Apr 2008|
|Event||Fiber lasers V: technology, systems, and applications - San Jose, CA, United States|
Duration: 21 Jan 2008 → 24 Jan 2008
|Conference||Fiber lasers V: technology, systems, and applications|
|City||San Jose, CA|
|Period||21/01/08 → 24/01/08|
Bibliographical noteBabin, 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.
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- fibre laser
- mode structure
- spectral broadening
- wave turbulence