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Q: Fachverband Quantenoptik und Photonik
Q 59: Ultrakurze Laserpulse
Q 59.6: Vortrag
Freitag, 16. März 2012, 11:45–12:00, V38.04
Rogue waves in the transverse domain of multifilaments — •Simon Birkholz1, Carsten Brée1,2, Goery Genty3, Erik Nibbering1, and Günter Steinmeyer1,3 — 1Max Born Institute, Berlin, Germany — 2Weierstrass-Institut für Angewandte Analysis und Stochastik, Berlin, Germany — 3Tampere University of Technology, Finland
We experimentally demonstrate rogue waves in multiple filamentation of pulsed laser beams. Other than previous demonstrations in optics, we observe rogue waves in a two-dimensional system analogous to deep water waves. The much stronger modulational instability in our system makes the appearance of rare events a ubiquitous phenomenon at the onset of multiple filamentation. We provide a careful statistical analysis of the L-shaped intensity distributions measured with a kHz line scan camera. In addition to the experimental observations, numerical simulations of multifilament formation are conducted. The numerical analysis indicates interaction between individual filament strings behind the appearance of rogue waves, widely confirming similar observations in the one-dimensional optical system and oceanic scenarios. We therefore believe that our experimental and theoretical analysis brings us closer to a unifying theory about the general appearance of extreme events in physics.