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SUMMARY:Optical Wave Turbulence in Fibre Lasers - Sergei Turitsyn (Aston U
 niversity)
DTSTART:20221212T102500Z
DTEND:20221212T105500Z
UID:TALK182510@talks.cam.ac.uk
DESCRIPTION:Nonlinear interactions of a large number of cavity modes are r
 esponsible for practically important characteristics of high power multimo
 de fibre lasers\, such as spectra of generated radiation. The total genera
 ted fibre laser power is distributed between multitude of resonator modes\
 , each with a small amplitude. However\, the overall nonlinear (powe depen
 dent) effect of the interactions between such small amplitude modes is eas
 ily observable. The nonlinear Kerr effect in fibre affects the propagation
  of light in the cavity and leads to a nonlinear four-wave mixing of longi
 tudinal modes. As a result\, the resonator is not linear and the operation
  and performance of such lasers depends on radiation power. For instance\,
  the spectra of generated radiation experience spectral broadening as the 
 laser power increases. Fibre laser is not only a remarkable engineering de
 vice\, but also a complex nonlinear physical system with a rich repertoire
  of dynamic behaviour and phenomena. Mathematical models of the wave tubul
 ence in fibre lasers and open questions will be disucssed.
LOCATION:External
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