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K: Fachverband Kurzzeit- und angewandte Laserphysik
K 5: Laser Systems and Laser Applications
K 5.7: Vortrag
Mittwoch, 11. März 2020, 12:30–12:45, f428
Complete spatio-temporal characterization of femtosecond filaments in gases — •Christoph Jusko1, Lana Neoričić2, Sara Mikaelsson2, Chen Guo2, Shiyang Zhong2, Anne L’Huillier2, Uwe Morgner1, Arnaud Couairon3, Milutin Kovačev1, and Cord Arnold2 — 1Institut für Quantenoptik, Cluster of Excellence PhoenixD and QuantumFrontiers, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover — 2Department of Physics, Lund University, Professorsgatan 1, 223 63 Lund, Sweden — 3CPHT, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Palaiseau, France
The propagation of femtosecond laser pulses in gas filaments is dominated by a dynamic balance of self-focusing due to the Kerr effect and defocusing due to plasma generation. This interplay of effects causes highly nonlinear dynamics acting on the spatio-temporal properties of the pulse which cannot be investigated seperately without an information loss. So far, due to the lack of adequate diagnostic methods, characterization studies of femtosecond filaments have solely looked at either the spatial or temporal dynamics of the pulse. We present the first study of complete spatio-temporal dynamics of a femtosecond filament, realized by filament termination [1] at defined points along its length and accurate pulse characterization by spatio-temporal Fourier transform spectrometry [2], supported by d-scan measurements [3].
[1] D. Steingrube et al., New J. Phys. 13, 043022 (2011)
[2] M. Miranda et al., Opt. Lett. 39, 5142 (2014)
[3] M. Miranda et al., Opt. Express 20, 688 (2012)